Revert "Bump com.puppycrawl.tools:checkstyle from 8.2 to 13.4.2 in /examples …" (#8649)

This reverts commit b7c5ca5.

Author: reiabreu

pom.xml

@@ -1070,7 +1070,7 @@
                             <artifactId>checkstyle</artifactId>
                             <!-- If you change this, you should also update the storm_checkstyle.xml file to be
                             based on the google_checks.xml from the version of checkstyle you are choosing. -->
-                            <version>13.4.2</version>
+                            <version>8.2</version>
                         </dependency>
                     </dependencies>
                     <executions>