chore(deps): update dependency com.puppycrawl.tools:checkstyle to v10.21.2

Author: renovate[bot]

pom.xml

@@ -29,7 +29,7 @@
     <dependency>
       <groupId>com.puppycrawl.tools</groupId>
       <artifactId>checkstyle</artifactId>
-      <version>10.12.7</version>
+      <version>10.21.2</version>
       <optional>true</optional>
     </dependency>
     <dependency>