Bump com.puppycrawl.tools:checkstyle from 10.20.2 to 10.21.0

Bumps [com.puppycrawl.tools:checkstyle](https://github.com/checkstyle/checkstyle) from 10.20.2 to 10.21.0.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](checkstyle/checkstyle@checkstyle-10.20.2...checkstyle-10.21.0)

---
updated-dependencies:
- dependency-name: com.puppycrawl.tools:checkstyle
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

parent/pom.xml

@@ -128,7 +128,7 @@
         <version.protobuf.plugin>0.6.1</version.protobuf.plugin>
 
         <version.infinispan.checkstyle>15.0.10.Final</version.infinispan.checkstyle>
-        <version.com.puppycrawl.tools.checkstyle>10.20.2</version.com.puppycrawl.tools.checkstyle>
+        <version.com.puppycrawl.tools.checkstyle>10.21.0</version.com.puppycrawl.tools.checkstyle>
         <version.junit>4.13.2</version.junit>
         <version.compile-testing>0.21</version.compile-testing>
         <version.mockito>5.14.2</version.mockito>