build(deps): bump com.google.cloud:google-cloud-spanner-hibernate-tools (#4164)

Bumps [com.google.cloud:google-cloud-spanner-hibernate-tools](https://github.com/GoogleCloudPlatform/google-cloud-spanner-hibernate) from 4.2.0 to 4.2.2.
- [Release notes](https://github.com/GoogleCloudPlatform/google-cloud-spanner-hibernate/releases)
- [Changelog](https://github.com/GoogleCloudPlatform/google-cloud-spanner-hibernate/blob/master/CHANGELOG.md)
- [Commits](GoogleCloudPlatform/google-cloud-spanner-hibernate@v4.2.0...v4.2.2)

---
updated-dependencies:
- dependency-name: com.google.cloud:google-cloud-spanner-hibernate-tools
  dependency-version: 4.2.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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samples/java/hibernate/pom.xml

@@ -51,7 +51,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-spanner-hibernate-tools</artifactId>
-      <version>4.2.0</version>
+      <version>4.2.2</version>
     </dependency>
     <!-- Add Hypersistence Utils for access to additional data type mappings, for example for arrays. -->
     <dependency>