Bump checkstyle to get rid of warning

Author: justinabrahms

pom.xml

@@ -345,7 +345,7 @@
           <dependency>
             <groupId>com.puppycrawl.tools</groupId>
             <artifactId>checkstyle</artifactId>
-            <version>8.30</version>
+            <version>8.31</version>
           </dependency>
         </dependencies>
         <executions>