Maven pom.xml(deps-dev): Bump xmlunit.version from 2.9.0 to 2.9.1

Bumps `xmlunit.version` from 2.9.0 to 2.9.1.

Updates `xmlunit-core` from 2.9.0 to 2.9.1
- [Release notes](https://github.com/xmlunit/xmlunit/releases)
- [Changelog](https://github.com/xmlunit/xmlunit/blob/main/RELEASE_NOTES.md)
- [Commits](xmlunit/xmlunit@v2.9.0...v2.9.1)

Updates `xmlunit-matchers` from 2.9.0 to 2.9.1
- [Release notes](https://github.com/xmlunit/xmlunit/releases)
- [Changelog](https://github.com/xmlunit/xmlunit/blob/main/RELEASE_NOTES.md)
- [Commits](xmlunit/xmlunit@v2.9.0...v2.9.1)

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

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

pom.xml

@@ -46,7 +46,7 @@
 
         <lombok.version>1.18.24</lombok.version>
         <quarkus.version>2.15.3.Final</quarkus.version>
-        <xmlunit.version>2.9.0</xmlunit.version>
+        <xmlunit.version>2.9.1</xmlunit.version>
         <xsender.version>4.1.1</xsender.version>
     </properties>