Bump xmlunit-core from 2.8.2 to 2.8.3 (#6616)

Bumps [xmlunit-core](https://github.com/xmlunit/xmlunit) from 2.8.2 to 2.8.3.
- [Release notes](https://github.com/xmlunit/xmlunit/releases)
- [Changelog](https://github.com/xmlunit/xmlunit/blob/main/RELEASE_NOTES.md)
- [Commits](xmlunit/xmlunit@v2.8.2...v2.8.3)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle

@@ -183,7 +183,7 @@ dependencies {
         exclude group: 'xml-apis', module: 'xml-apis'
     }
     implementation group: 'net.sourceforge.argparse4j', name: 'argparse4j', version: '0.9.0'
-    implementation group: 'org.xmlunit', name: 'xmlunit-core', version:'2.8.2'
+    implementation group: 'org.xmlunit', name: 'xmlunit-core', version:'2.8.3'
     implementation group: 'org.controlsfx', name: 'controlsfx', version:'11.1.0'
 
     implementation group: 'net.sourceforge.pcgen', name: 'PCGen-base', version:'1.0.170'