Bump xmlunit-matchers from 2.8.3 to 2.8.4 (#8461)
Bump xmlunit-matchers from 2.8.3 to 2.8.4 (#8461)

Bumps [xmlunit-matchers](https://github.com/xmlunit/xmlunit) from 2.8.3 to 2.8.4.
- [Release notes](https://github.com/xmlunit/xmlunit/releases)
- [Changelog](https://github.com/xmlunit/xmlunit/blob/main/RELEASE_NOTES.md)
- [Commits](https://github.com/xmlunit/xmlunit/compare/v2.8.3...v2.8.4)

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

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
JabRef/jabref,JabRef/jabref,JabRef/jabref,JabRef/jabref