Bump google-cloud-datastore from 2.5.1 to 2.6.0 (#8092)

Bumps [google-cloud-datastore](https://github.com/googleapis/java-datastore) from 2.5.1 to 2.6.0.
- [Release notes](https://github.com/googleapis/java-datastore/releases)
- [Changelog](https://github.com/googleapis/java-datastore/blob/main/CHANGELOG.md)
- [Commits](https://github.com/googleapis/java-datastore/compare/v2.5.1...v2.6.0)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

jetty-gcloud/pom.xml

@@ -13,7 +13,7 @@
   <name>Jetty :: GCloud</name>
 
   <properties>
-    <gcloud.version>2.5.1</gcloud.version>
+    <gcloud.version>2.6.0</gcloud.version>
   </properties>
 
   <modules>