Bump xmlunit-legacy from 2.8.3 to 2.8.4

Bumps [xmlunit-legacy](https://github.com/xmlunit/xmlunit) from 2.8.3 to 2.8.4.
- [Release notes](https://github.com/xmlunit/xmlunit/releases)
- [Changelog](https://github.com/xmlunit/xmlunit/blob/main/RELEASE_NOTES.md)
- [Commits](https://github.com/xmlunit/xmlunit/compare/v2.8.3...v2.8.4)

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

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index 4443e85..3370a5e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -817,7 +817,7 @@
             <dependency>
                 <groupId>org.xmlunit</groupId>
                 <artifactId>xmlunit-legacy</artifactId>
-                <version>2.8.3</version>
+                <version>2.8.4</version>
             </dependency>
             <dependency>
                 <groupId>junit</groupId>