Bump org.apache.groovy:groovy-bom from 4.0.18 to 4.0.20

Bumps [org.apache.groovy:groovy-bom](https://github.com/apache/groovy) from 4.0.18 to 4.0.20.
- [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
...

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

pom.xml

@@ -67,7 +67,7 @@ under the License.
     <beanshell-artifactId>bsh</beanshell-artifactId>
     <beanshell-version>2.0b6</beanshell-version>
     <project.build.outputTimestamp>2023-06-11T17:18:10Z</project.build.outputTimestamp>
-    <groovy-version>4.0.18</groovy-version>
+    <groovy-version>4.0.20</groovy-version>
   </properties>
 
   <dependencyManagement>