chore(deps): update dependency com.google.cloud:google-cloud-logging to v3.15.15 (#1488)

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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) | `3.15.13` -> `3.15.15` | [![age](https://developer.mend.io/api/mc/badges/age/maven/com.google.cloud:google-cloud-logging/3.15.15?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/com.google.cloud:google-cloud-logging/3.15.15?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/com.google.cloud:google-cloud-logging/3.15.13/3.15.15?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/com.google.cloud:google-cloud-logging/3.15.13/3.15.15?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>

### [`v3.15.15`](https://togithub.com/googleapis/java-logging/blob/HEAD/CHANGELOG.md#31515-2024-01-10)

[Compare Source](https://togithub.com/googleapis/java-logging/compare/v3.15.14...v3.15.15)

##### Bug Fixes

-   **deps:** Update the Java code generator (gapic-generator-java) to 2.31.0 ([#&#8203;1502](https://togithub.com/googleapis/java-logging/issues/1502)) ([c7a20de](https://togithub.com/googleapis/java-logging/commit/c7a20de29bf6fae079f8d73e3062025a79c220c9))
-   Replace internal Structs class with google-cloud-core version ([#&#8203;1501](https://togithub.com/googleapis/java-logging/issues/1501)) ([21e1929](https://togithub.com/googleapis/java-logging/commit/21e19295923a33759229e2e992d003409ab1feb3))

##### Dependencies

-   Update dependency com.google.cloud:google-cloud-shared-dependencies to v3.21.0 ([#&#8203;1500](https://togithub.com/googleapis/java-logging/issues/1500)) ([6cce3c9](https://togithub.com/googleapis/java-logging/commit/6cce3c9bbe051180789c7ff4fbdde4c45fe46888))

### [`v3.15.14`](https://togithub.com/googleapis/java-logging/blob/HEAD/CHANGELOG.md#31514-2023-12-01)

[Compare Source](https://togithub.com/googleapis/java-logging/compare/v3.15.13...v3.15.14)

##### Dependencies

-   Update dependency com.google.cloud:google-cloud-shared-dependencies to v3.20.0 ([#&#8203;1484](https://togithub.com/googleapis/java-logging/issues/1484)) ([f3227db](https://togithub.com/googleapis/java-logging/commit/f3227dbbb6ef7f8b16ff4a6d39882f57868915f1))

</details>

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Author: renovate-bot

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>3.15.13</version>
+  <version>3.15.15</version>
 </dependency>
 
 ```

samples/install-without-bom/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-logging</artifactId>
-      <version>3.15.13</version>
+      <version>3.15.15</version>
     </dependency>
     <!-- [END logging_install_without_bom] -->