build(deps): update dependency org.apache.maven.plugins:maven-checkstyle-plugin to v3.2.1 (#1455)

* build(deps): update dependency org.apache.maven.plugins:maven-checkstyle-plugin to v3.2.1

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: renovate-bot

java-pubsub/samples/pom.xml

@@ -75,7 +75,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-checkstyle-plugin</artifactId>
-        <version>3.2.0</version>
+        <version>3.2.1</version>
         <configuration>
           <suppressionsLocation>checkstyle-suppressions.xml</suppressionsLocation>
         </configuration>