Bump org.codehaus.groovy:groovy-bom from 3.0.20 to 3.0.21

Bumps [org.codehaus.groovy:groovy-bom](https://github.com/apache/groovy) from 3.0.20 to 3.0.21.
- [Commits](https://github.com/apache/groovy/commits)

---
updated-dependencies:
- dependency-name: org.codehaus.groovy:groovy-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

log4j-parent/pom.xml

@@ -84,7 +84,7 @@
     <flapdoodle-embed.version>4.9.0</flapdoodle-embed.version>
     <flapdoodle-reverse.version>1.7.2</flapdoodle-reverse.version>
     <flume.version>1.11.0</flume.version>
-    <groovy.version>3.0.20</groovy.version>
+    <groovy.version>3.0.21</groovy.version>
     <guava.version>33.0.0-jre</guava.version>
     <h2.version>2.2.224</h2.version>
     <hadoop.version>1.2.1</hadoop.version>