Bump libraries-bom from 25.2.0 to 25.3.0

Bumps [libraries-bom](https://github.com/GoogleCloudPlatform/cloud-opensource-java) from 25.2.0 to 25.3.0.
- [Release notes](https://github.com/GoogleCloudPlatform/cloud-opensource-java/releases)
- [Changelog](https://github.com/GoogleCloudPlatform/cloud-opensource-java/blob/master/CHANGELOG.md)
- [Commits](https://github.com/GoogleCloudPlatform/cloud-opensource-java/commits)

---
updated-dependencies:
- dependency-name: com.google.cloud:libraries-bom
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -56,7 +56,7 @@
             <dependency>
                 <groupId>com.google.cloud</groupId>
                 <artifactId>libraries-bom</artifactId>
-                <version>25.2.0</version>
+                <version>25.3.0</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>