chore(deps): update dependency com.google.cloud:google-cloud-logging …

…to v3.15.6 (#1392)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-logging](https://togithub.com/googleapis/java-logging) | `3.15.5` -> `3.15.6` | [![age](https://developer.mend.io/api/mc/badges/age/maven/com.google.cloud:google-cloud-logging/3.15.6?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/com.google.cloud:google-cloud-logging/3.15.6?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/com.google.cloud:google-cloud-logging/3.15.5/3.15.6?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/com.google.cloud:google-cloud-logging/3.15.5/3.15.6?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/java-logging (com.google.cloud:google-cloud-logging)</summary>

### [`v3.15.6`](https://togithub.com/googleapis/java-logging/blob/HEAD/CHANGELOG.md#3156-2023-07-17)

[Compare Source](https://togithub.com/googleapis/java-logging/compare/v3.15.5...v3.15.6)

##### Dependencies

-   Update dependency com.google.cloud:google-cloud-shared-dependencies to v3.13.0 ([#&#8203;1388](https://togithub.com/googleapis/java-logging/issues/1388)) ([03179b0](https://togithub.com/googleapis/java-logging/commit/03179b0697f17bfc114ff114e454464ed76f8d5b))

</details>

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README.md

@@ -44,7 +44,7 @@ If you are using Maven without the BOM, add this to your dependencies:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-logging</artifactId>
-  <version>3.15.5</version>
+  <version>3.15.6</version>
 </dependency>
 
 ```

samples/install-without-bom/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-logging</artifactId>
-      <version>3.15.5</version>
+      <version>3.15.6</version>
     </dependency>
     <!-- [END logging_install_without_bom] -->