dependency: bump maven-checkstyle-plugin

Bumps [maven-checkstyle-plugin](https://github.com/apache/maven-checkstyle-plugin) from 3.2.0 to 3.2.1.
- [Release notes](https://github.com/apache/maven-checkstyle-plugin/releases)
- [Commits](apache/maven-checkstyle-plugin@maven-checkstyle-plugin-3.2.0...maven-checkstyle-plugin-3.2.1)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-checkstyle-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

sevntu-checkstyle-sonar-plugin/pom.xml

@@ -27,7 +27,7 @@
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <checkstyle.version>10.6.0</checkstyle.version>
-    <checkstyle.plugin.version>3.2.0</checkstyle.plugin.version>
+    <checkstyle.plugin.version>3.2.1</checkstyle.plugin.version>
     <sonar.version>7.9</sonar.version>
     <staxmate.version>2.0.1</staxmate.version>
     <java.version>11</java.version>