docs: Update documentation.

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Here's the log from Synthtool:

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/VideoIntelligence/synth.py.
synthtool > Ensuring dependencies.
synthtool > Pulling artman image.
latest: Pulling from googleapis/artman
Digest: sha256:0d2f8d429110aeb8d82df6550ef4ede59d40df9062d260a1580fce688b0512bf
Status: Image is up to date for googleapis/artman:latest
synthtool > Cloning googleapis.
synthtool > Running generator for google/cloud/videointelligence/artman_videointelligence_v1.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/php/google-cloud-video-intelligence-v1.
synthtool > Running generator for google/cloud/videointelligence/artman_videointelligence_v1beta2.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/php/google-cloud-video-intelligence-v1beta2.
synthtool > Replaced "'serviceAddress' =>" in src/V1/Gapic/VideoIntelligenceServiceGapicClient.php.
synthtool > Replaced "'serviceAddress' =>" in src/V1beta2/Gapic/VideoIntelligenceServiceGapicClient.php.
synthtool > Replaced '@type string \\$serviceAddress\\n\\s+\\*\\s+The address' in src/V1/Gapic/VideoIntelligenceServiceGapicClient.php.
synthtool > Replaced '@type string \\$serviceAddress\\n\\s+\\*\\s+The address' in src/V1beta2/Gapic/VideoIntelligenceServiceGapicClient.php.
synthtool > Replaced '\\$transportConfig, and any \\$serviceAddress' in src/V1/Gapic/VideoIntelligenceServiceGapicClient.php.
synthtool > Replaced '\\$transportConfig, and any \\$serviceAddress' in src/V1beta2/Gapic/VideoIntelligenceServiceGapicClient.php.
synthtool > Replaced 'final class' in src/V1/ExplicitContentAnnotation.php.
synthtool > Replaced 'final class' in src/V1/VideoAnnotationResults.php.
synthtool > Replaced 'final class' in src/V1/FaceAnnotation.php.
synthtool > Replaced 'final class' in src/V1/Entity.php.
synthtool > Replaced 'final class' in src/V1/ShotChangeDetectionConfig.php.
synthtool > Replaced 'final class' in src/V1/NormalizedBoundingBox.php.
synthtool > Replaced 'final class' in src/V1/NormalizedBoundingPoly.php.
synthtool > Replaced 'final class' in src/V1/TextFrame.php.
synthtool > Replaced 'final class' in src/V1/ExplicitContentDetectionConfig.php.
synthtool > Replaced 'final class' in src/V1/ObjectTrackingFrame.php.
synthtool > Replaced 'final class' in src/V1/SpeechRecognitionAlternative.php.
synthtool > Replaced 'final class' in src/V1/SpeechTranscription.php.
synthtool > Replaced 'final class' in src/V1/SpeechContext.php.
synthtool > Replaced 'final class' in src/V1/LabelDetectionConfig.php.
synthtool > Replaced 'final class' in src/V1/SpeechTranscriptionConfig.php.
synthtool > Replaced 'final class' in src/V1/WordInfo.php.
synthtool > Replaced 'final class' in src/V1/AnnotateVideoProgress.php.
synthtool > Replaced 'final class' in src/V1/LabelAnnotation.php.
synthtool > Replaced 'final class' in src/V1/AnnotateVideoRequest.php.
synthtool > Replaced 'final class' in src/V1/ObjectTrackingAnnotation.php.
synthtool > Replaced 'final class' in src/V1/NormalizedVertex.php.
synthtool > Replaced 'final class' in src/V1/VideoSegment.php.
synthtool > Replaced 'final class' in src/V1/VideoAnnotationProgress.php.
synthtool > Replaced 'final class' in src/V1/FaceSegment.php.
synthtool > Replaced 'final class' in src/V1/LabelSegment.php.
synthtool > Replaced 'final class' in src/V1/VideoContext.php.
synthtool > Replaced 'final class' in src/V1/TextSegment.php.
synthtool > Replaced 'final class' in src/V1/ExplicitContentFrame.php.
synthtool > Replaced 'final class' in src/V1/AnnotateVideoResponse.php.
synthtool > Replaced 'final class' in src/V1/FaceDetectionConfig.php.
synthtool > Replaced 'final class' in src/V1/FaceFrame.php.
synthtool > Replaced 'final class' in src/V1/LabelFrame.php.
synthtool > Replaced 'final class' in src/V1/TextAnnotation.php.
synthtool > Replaced 'final class' in src/V1/TextDetectionConfig.php.
synthtool > Replaced 'final class' in src/V1/ObjectTrackingConfig.php.
synthtool > Replaced 'final class' in src/V1beta2/ExplicitContentAnnotation.php.
synthtool > Replaced 'final class' in src/V1beta2/VideoAnnotationResults.php.
synthtool > Replaced 'final class' in src/V1beta2/FaceAnnotation.php.
synthtool > Replaced 'final class' in src/V1beta2/Entity.php.
synthtool > Replaced 'final class' in src/V1beta2/ShotChangeDetectionConfig.php.
synthtool > Replaced 'final class' in src/V1beta2/NormalizedBoundingBox.php.
synthtool > Replaced 'final class' in src/V1beta2/ExplicitContentDetectionConfig.php.
synthtool > Replaced 'final class' in src/V1beta2/LabelDetectionConfig.php.
synthtool > Replaced 'final class' in src/V1beta2/AnnotateVideoProgress.php.
synthtool > Replaced 'final class' in src/V1beta2/LabelAnnotation.php.
synthtool > Replaced 'final class' in src/V1beta2/AnnotateVideoRequest.php.
synthtool > Replaced 'final class' in src/V1beta2/VideoSegment.php.
synthtool > Replaced 'final class' in src/V1beta2/VideoAnnotationProgress.php.
synthtool > Replaced 'final class' in src/V1beta2/FaceSegment.php.
synthtool > Replaced 'final class' in src/V1beta2/LabelSegment.php.
synthtool > Replaced 'final class' in src/V1beta2/VideoContext.php.
synthtool > Replaced 'final class' in src/V1beta2/ExplicitContentFrame.php.
synthtool > Replaced 'final class' in src/V1beta2/AnnotateVideoResponse.php.
synthtool > Replaced 'final class' in src/V1beta2/FaceDetectionConfig.php.
synthtool > Replaced 'final class' in src/V1beta2/FaceFrame.php.
synthtool > Replaced 'final class' in src/V1beta2/LabelFrame.php.
synthtool > No replacements made in src/V*/**/*.php for pattern public function ([s|g]\w{3,})Unwrapped, maybe replacement is not longer needed?
synthtool > Replaced 'Copyright \\d{4}' in src/V1/Gapic/VideoIntelligenceServiceGapicClient.php.
synthtool > Replaced 'Copyright \\d{4}' in src/V1beta2/Gapic/VideoIntelligenceServiceGapicClient.php.
synthtool > Replaced 'Copyright \\d{4}' in src/V1/VideoIntelligenceServiceClient.php.
synthtool > Replaced 'Copyright \\d{4}' in src/V1beta2/VideoIntelligenceServiceClient.php.
synthtool > Replaced 'Copyright \\d{4}' in tests/System/V1/VideoIntelligenceServiceClientTest.php.
synthtool > Replaced 'Copyright \\d{4}' in tests/System/V1/VideoIntelligenceServiceSmokeTest.php.
synthtool > Replaced 'Copyright \\d{4}' in tests/Unit/V1/VideoIntelligenceServiceClientTest.php.
synthtool > Replaced 'Copyright \\d{4}' in tests/Unit/V1beta2/VideoIntelligenceServiceClientTest.php.
synthtool > Replaced '^(\\s+\\*\\n)?\\s+\\*\\s@experimental\\n' in src/V1/VideoIntelligenceServiceClient.php.
synthtool > Replaced '^(\\s+\\*\\n)?\\s+\\*\\s@experimental\\n' in src/V1/Gapic/VideoIntelligenceServiceGapicClient.php.
synthtool > Cleaned up 1 temporary directories.
synthtool > Wrote metadata to synth.metadata.

[codecov]

Codecov Report

Merging #2388 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #2388   +/-   ##
=========================================
  Coverage     92.55%   92.55%           
  Complexity     4503     4503           
=========================================
  Files           312      312           
  Lines         13497    13497           
=========================================
  Hits          12492    12492           
  Misses         1005     1005

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