Bump org.codehaus.groovy:groovy in /test-project-groovy

Bumps [org.codehaus.groovy:groovy](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
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

test-project-groovy/build.gradle

@@ -26,7 +26,7 @@ subprojects {
     }
 
     dependencies {
-        implementation 'org.codehaus.groovy:groovy:3.0.20'
+        implementation 'org.codehaus.groovy:groovy:3.0.21'
         testImplementation "org.junit.jupiter:junit-jupiter-api:$jUnitVersion"
         testImplementation "org.junit.jupiter:junit-jupiter-params:$jUnitVersion"
         testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:$jUnitVersion"