chore(deps): bump com.google.cloud:libraries-bom from 26.39.0 to 26.42.0

Bumps [com.google.cloud:libraries-bom](https://github.com/googleapis/java-cloud-bom) from 26.39.0 to 26.42.0.
- [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@v26.39.0...v26.42.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

build.gradle

@@ -60,7 +60,7 @@ dependencies {
     compileOnly'org.slf4j:slf4j-api'
 
     // libs
-    api platform('com.google.cloud:libraries-bom:26.39.0')
+    api platform('com.google.cloud:libraries-bom:26.42.0')
     api 'com.google.cloud:google-cloud-storage'
 }