Update org.xmlunit:xmlunit-core to version 2.10.3 (#3764)

Co-authored-by: ASF Logging Services RM <private@logging.apache.org>

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)

src/changelog/.3.x.x/update_org_xmlunit_xmlunit_core.xml

@@ -3,6 +3,6 @@
        xmlns="https://logging.apache.org/xml/ns"
        xsi:schemaLocation="https://logging.apache.org/xml/ns https://logging.apache.org/xml/ns/log4j-changelog-0.xsd"
        type="updated">
-  <issue id="3683" link="https://github.com/apache/logging-log4j2/pull/3683"/>
-  <description format="asciidoc">Update `org.xmlunit:xmlunit-core` to version `2.10.2`</description>
+  <issue id="3764" link="https://github.com/apache/logging-log4j2/pull/3764"/>
+  <description format="asciidoc">Update `org.xmlunit:xmlunit-core` to version `2.10.3`</description>
 </entry>