deps: bump com.google.cloud:libraries-bom from 26.38.0 to 26.39.0 (#2867

)

Bumps [com.google.cloud:libraries-bom](https://github.com/googleapis/java-cloud-bom) from 26.38.0 to 26.39.0.
- [Release notes](https://github.com/googleapis/java-cloud-bom/releases)
- [Changelog](https://github.com/googleapis/java-cloud-bom/blob/main/release-please-config.json)
- [Commits](googleapis/java-cloud-bom@v26.38.0...v26.39.0)

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

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spring-cloud-gcp-dependencies/pom.xml

@@ -34,7 +34,7 @@
 	</distributionManagement>
 
 	<properties>
-		<gcp-libraries-bom.version>26.38.0</gcp-libraries-bom.version>
+		<gcp-libraries-bom.version>26.39.0</gcp-libraries-bom.version>
 		<cloud-sql-socket-factory.version>1.18.0</cloud-sql-socket-factory.version>
 		<r2dbc-postgres-driver.version>1.0.5.RELEASE</r2dbc-postgres-driver.version>
 		<cloud-spanner-r2dbc.version>1.3.0</cloud-spanner-r2dbc.version>