Bump xmlunit.version from 2.11.0 to 2.12.0

Bumps `xmlunit.version` from 2.11.0 to 2.12.0.

Updates `org.xmlunit:xmlunit-core` 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)

Updates `org.xmlunit:xmlunit-matchers` 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-core
  dependency-version: 2.12.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.xmlunit:xmlunit-matchers
  dependency-version: 2.12.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -99,7 +99,7 @@
         <junit.version>5.14.4</junit.version>
         <slf4j.version>2.0.18</slf4j.version>
         <xalan.version>2.7.3</xalan.version>
-        <xmlunit.version>2.11.0</xmlunit.version>
+        <xmlunit.version>2.12.0</xmlunit.version>
         <xml.bind.api.version>4.0.5</xml.bind.api.version>
         <woodstox.core.version>7.2.0</woodstox.core.version>