Bump revision from 5.11.2 to 5.12.1

Bumps `revision` from 5.11.2 to 5.12.1.

Updates `kubernetes-client` from 5.11.2 to 5.12.1
- [Release notes](https://github.com/fabric8io/kubernetes-client/releases)
- [Changelog](https://github.com/fabric8io/kubernetes-client/blob/master/CHANGELOG.md)
- [Commits](fabric8io/kubernetes-client@v5.11.2...v5.12.1)

Updates `openshift-client` from 5.11.2 to 5.12.1
- [Release notes](https://github.com/fabric8io/kubernetes-client/releases)
- [Changelog](https://github.com/fabric8io/kubernetes-client/blob/master/CHANGELOG.md)
- [Commits](fabric8io/kubernetes-client@v5.11.2...v5.12.1)

Updates `volumesnapshot-client` from 5.11.2 to 5.12.1

---
updated-dependencies:
- dependency-name: io.fabric8:kubernetes-client
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.fabric8:openshift-client
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.fabric8:volumesnapshot-client
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -13,7 +13,7 @@
     <version>${revision}-${changelist}</version>
     <packaging>hpi</packaging>
     <properties>
-        <revision>5.11.2</revision>
+        <revision>5.12.1</revision>
         <changelist>999999-SNAPSHOT</changelist>
         <jenkins.version>2.249</jenkins.version>
         <java.level>8</java.level>