Bump xmlunit-core from 2.7.0 to 2.8.0 (#7065)

Bumps [xmlunit-core](https://github.com/xmlunit/xmlunit) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/xmlunit/xmlunit/releases)
- [Changelog](https://github.com/xmlunit/xmlunit/blob/main/RELEASE_NOTES.md)
- [Commits](xmlunit/xmlunit@v2.7.0...v2.8.0)

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

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

build.gradle

@@ -208,7 +208,7 @@ dependencies {
     testRuntime group: 'org.apache.logging.log4j', name: 'log4j-core', version: '3.0.0-SNAPSHOT'
     testRuntime group: 'org.apache.logging.log4j', name: 'log4j-jul', version: '3.0.0-SNAPSHOT'
     testImplementation 'org.mockito:mockito-core:3.6.0'
-    testImplementation 'org.xmlunit:xmlunit-core:2.7.0'
+    testImplementation 'org.xmlunit:xmlunit-core:2.8.0'
     testImplementation 'org.xmlunit:xmlunit-matchers:2.7.0'
     testRuntime 'com.tngtech.archunit:archunit-junit5-engine:0.14.1'
     testImplementation 'com.tngtech.archunit:archunit-junit5-api:0.14.1'