Bump com.puppycrawl.tools:checkstyle in the plugins group

Bumps the plugins group with 1 update: [com.puppycrawl.tools:checkstyle](https://github.com/checkstyle/checkstyle).


Updates `com.puppycrawl.tools:checkstyle` from 10.21.0 to 10.21.1
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](checkstyle/checkstyle@checkstyle-10.21.0...checkstyle-10.21.1)

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

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

pom.xml

@@ -49,7 +49,7 @@
     <guava.version>33.4.0-jre</guava.version>
 
     <!-- tooling -->
-    <checkstyle.tool.version>10.21.0</checkstyle.tool.version>
+    <checkstyle.tool.version>10.21.1</checkstyle.tool.version>
 
     <!-- testing -->
     <junit.version>5.11.4</junit.version>