Bump version.groovy from 3.0.20 to 3.0.21 (#280)

Bumps `version.groovy` from 3.0.20 to 3.0.21.

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

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

Updates `org.codehaus.groovy:groovy-jsr223` 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
- dependency-name: org.codehaus.groovy:groovy-json
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.codehaus.groovy:groovy-jsr223
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pom.xml

@@ -27,7 +27,7 @@
         <maven.compiler.release>11</maven.compiler.release>
         <skipITs>true</skipITs>
 
-        <version.groovy>3.0.20</version.groovy>
+        <version.groovy>3.0.21</version.groovy>
         <version.assembly.plugin>3.6.0</version.assembly.plugin>
         <!-- Use same version as iceberg https://github.com/apache/iceberg/blob/main/gradle/libs.versions.toml#L53-->
         <version.jackson>2.14.2</version.jackson>