chore(deps): update dependency com.puppycrawl.tools:checkstyle to v12

Author: renovate[bot]

depclean-core/pom.xml

@@ -20,7 +20,7 @@
     <!-- Dependencies -->
     <asm.version>9.8</asm.version>
     <assertj.version>3.27.3</assertj.version>
-    <checkstyle.version>10.26.1</checkstyle.version>
+    <checkstyle.version>12.2.0</checkstyle.version>
     <commons-io.version>2.20.0</commons-io.version>
     <guava.version>33.4.8-jre</guava.version>
     <jgrapht.version>1.5.2</jgrapht.version>

depclean-maven-plugin/pom.xml

@@ -19,7 +19,7 @@
 
   <properties>
     <!-- Dependencies -->
-    <checkstyle.version>10.26.1</checkstyle.version>
+    <checkstyle.version>12.2.0</checkstyle.version>
     <commons-io.version>2.20.0</commons-io.version>
     <gson.version>2.13.1</gson.version>
     <itf-jupiter-extension.version>0.13.1</itf-jupiter-extension.version>