Use newer version of checkstyle in checkstyle plugin

Author: optionsome

pom.xml

@@ -339,6 +339,13 @@
                         <sourceDirectory>src/test-fixtures/java</sourceDirectory>
                     </sourceDirectories>
                 </configuration>
+                <dependencies>
+                    <dependency>
+                        <groupId>com.puppycrawl.tools</groupId>
+                        <artifactId>checkstyle</artifactId>
+                        <version>12.1.2</version>
+                    </dependency>
+                </dependencies>
                 <executions>
                     <execution>
                         <id>validate</id>

renovate.json5

@@ -78,6 +78,7 @@
         "org.apache.maven.plugins:maven-source-plugin",
         "com.hubspot.maven.plugins:prettier-maven-plugin",
         "com.google.cloud.tools:jib-maven-plugin",
+        "com.puppycrawl.tools:checkstyle",
         "org.apache.maven.plugins:maven-shade-plugin",
         "org.apache.maven.plugins:maven-compiler-plugin",
         "org.apache.maven.plugins:maven-jar-plugin",