chore(deps): update testing and code quality to v13.6.0

Author: renovate[bot]

pom.xml

@@ -628,7 +628,7 @@
           <dependency>
             <groupId>com.puppycrawl.tools</groupId>
             <artifactId>checkstyle</artifactId>
-            <version>13.5.0</version>
+            <version>13.6.0</version>
           </dependency>
         </dependencies>
         <configuration>