Bump com.puppycrawl.tools:checkstyle from 10.21.0 to 10.21.1 (#960)

Author: dependabot[bot]

pom.xml

@@ -205,7 +205,7 @@
             <dependency>
               <groupId>com.puppycrawl.tools</groupId>
               <artifactId>checkstyle</artifactId>
-              <version>10.21.0</version>
+              <version>10.21.1</version>
             </dependency>
           </dependencies>
         </plugin>