docs(gcp_pubsub source): Add required fields to documentation examples (

vectordotdev#18998)

* Add required fields to documentation examples for gcp pubsub source

* Add cue generated documentation changes

src/sources/gcp_pubsub.rs

@@ -131,9 +131,11 @@ static CLIENT_ID: Lazy<String> = Lazy::new(|| uuid::Uuid::new_v4().to_string());
 #[serde(deny_unknown_fields)]
 pub struct PubsubConfig {
     /// The project name from which to pull logs.
+    #[configurable(metadata(docs::examples = "my-log-source-project"))]
     pub project: String,
 
     /// The subscription within the project which is configured to receive logs.
+    #[configurable(metadata(docs::examples = "my-vector-source-subscription"))]
     pub subscription: String,
 
     /// The endpoint from which to pull data.

website/cue/reference/components/sources/base/gcp_pubsub.cue

@@ -356,7 +356,7 @@ base: components: sources: gcp_pubsub: configuration: {
 	project: {
 		description: "The project name from which to pull logs."
 		required:    true
-		type: string: {}
+		type: string: examples: ["my-log-source-project"]
 	}
 	retry_delay_seconds: {
 		deprecated:         true
@@ -376,7 +376,7 @@ base: components: sources: gcp_pubsub: configuration: {
 	subscription: {
 		description: "The subscription within the project which is configured to receive logs."
 		required:    true
-		type: string: {}
+		type: string: examples: ["my-vector-source-subscription"]
 	}
 	tls: {
 		description: "TLS configuration."