Bump xmlunit.version from 2.10.2 to 2.10.3

Bumps `xmlunit.version` from 2.10.2 to 2.10.3.

Updates `org.xmlunit:xmlunit-core` from 2.10.2 to 2.10.3
- [Release notes](https://github.com/xmlunit/xmlunit/releases)
- [Changelog](https://github.com/xmlunit/xmlunit/blob/main/RELEASE_NOTES.md)
- [Commits](xmlunit/xmlunit@v2.10.2...v2.10.3)

Updates `org.xmlunit:xmlunit-matchers` from 2.10.2 to 2.10.3
- [Release notes](https://github.com/xmlunit/xmlunit/releases)
- [Changelog](https://github.com/xmlunit/xmlunit/blob/main/RELEASE_NOTES.md)
- [Commits](xmlunit/xmlunit@v2.10.2...v2.10.3)

---
updated-dependencies:
- dependency-name: org.xmlunit:xmlunit-core
  dependency-version: 2.10.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
- dependency-name: org.xmlunit:xmlunit-matchers
  dependency-version: 2.10.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

log4j-parent/pom.xml

@@ -140,7 +140,7 @@
     <spotbugs-annotations.version>4.9.3</spotbugs-annotations.version>
     <system-stubs.version>2.1.8</system-stubs.version>
     <velocity.version>1.7</velocity.version>
-    <xmlunit.version>2.10.2</xmlunit.version>
+    <xmlunit.version>2.10.3</xmlunit.version>
 
     <!-- =====================================================
          Pinned transitive dependency version properties (in alphabetical order)