Bump git-changelist-maven-extension from 1.0-beta-4 to 1.2

Bumps [git-changelist-maven-extension](https://github.com/jenkinsci/incrementals-tools) from 1.0-beta-4 to 1.2.
- [Release notes](https://github.com/jenkinsci/incrementals-tools/releases)
- [Commits](https://github.com/jenkinsci/incrementals-tools/commits/parent-1.2

)

---
updated-dependencies:
- dependency-name: io.jenkins.tools.incrementals:git-changelist-maven-extension
  dependency-type: direct:production
...

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