Bump com.puppycrawl.tools:checkstyle from 9.3 to 10.21.2

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

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

pom.xml

@@ -54,7 +54,7 @@
 		<maven-eclipse-plugin.version>2.10</maven-eclipse-plugin.version>
 		<!-- for backwards compatibility, use maven-checkstyle-plugin.version -->
 		<checkstyle.version>${maven-checkstyle-plugin.version}</checkstyle.version>
-		<puppycrawl-tools-checkstyle.version>9.3</puppycrawl-tools-checkstyle.version>
+		<puppycrawl-tools-checkstyle.version>10.21.2</puppycrawl-tools-checkstyle.version>
 		<spring-javaformat.version>0.0.43</spring-javaformat.version>
 		<maven-failsafe-plugin.version>3.5.2</maven-failsafe-plugin.version>
 		<maven-javadoc-plugin.version>3.11.2</maven-javadoc-plugin.version>