Bump org.apache.groovy:groovy-bom from 4.0.20 to 4.0.21 (#9089)

Bumps [org.apache.groovy:groovy-bom](https://github.com/apache/groovy) from 4.0.20 to 4.0.21.
- [Commits](https://github.com/apache/groovy/commits)

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

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Author: dependabot[bot]

build.gradle

@@ -69,7 +69,7 @@ ext {
     ftpServerVersion = '1.2.0'
     graalvmVersion = '23.0.3'
     greenmailVersion = '2.1.0-alpha-4'
-    groovyVersion = '4.0.20'
+    groovyVersion = '4.0.21'
     hamcrestVersion = '2.2'
     hazelcastVersion = '5.3.7'
     hibernateVersion = '6.4.4.Final'