SLING-10636 Enable code checks with Checkstyle

update dependency
diff --git a/pom.xml b/pom.xml
index 92c7a1f..78b708f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -56,7 +56,7 @@
           <dependency>
             <groupId>com.puppycrawl.tools</groupId>
             <artifactId>checkstyle</artifactId>
-            <version>9.0</version>
+            <version>9.0.1</version>
           </dependency>
           <dependency>
             <groupId>de.bildschirmarbeiter</groupId>