Bump maven-checkstyle-plugin from 3.2.0 to 3.2.1

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>

pom.xml

@@ -42,7 +42,7 @@
         <jacoco-maven-plugin.version>0.8.8</jacoco-maven-plugin.version>
         <jaeger.version>1.8.1</jaeger.version>
         <prometheus.simpleclient_pushgateway.version>0.16.0</prometheus.simpleclient_pushgateway.version>
-        <maven-checkstyle-plugin.version>3.2.0</maven-checkstyle-plugin.version>
+        <maven-checkstyle-plugin.version>3.2.1</maven-checkstyle-plugin.version>
         <formatter-maven-plugin.version>2.21.0</formatter-maven-plugin.version>
         <impsort-maven-plugin.version>1.8.0</impsort-maven-plugin.version>
         <htmlunit.version>2.69.0</htmlunit.version>