Bump org.xmlunit:xmlunit-matchers from 2.11.0 to 2.12.0 (#7570)

Bumps [org.xmlunit:xmlunit-matchers](https://github.com/xmlunit/xmlunit) from 2.11.0 to 2.12.0.
- [Release notes](https://github.com/xmlunit/xmlunit/releases)
- [Changelog](https://github.com/xmlunit/xmlunit/blob/main/RELEASE_NOTES.md)
- [Commits](xmlunit/xmlunit@v2.11.0...v2.12.0)

---
updated-dependencies:
- dependency-name: org.xmlunit:xmlunit-matchers
  dependency-version: 2.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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