Bump org.apache.maven.plugins:maven-checkstyle-plugin (#489)

Author: dependabot[bot]

pom.xml

@@ -100,7 +100,7 @@
     <localizer-maven-plugin.version>1.31</localizer-maven-plugin.version>
     <maven-antrun-plugin.version>3.1.0</maven-antrun-plugin.version>
     <maven-assembly-plugin.version>3.6.0</maven-assembly-plugin.version>
-    <maven-checkstyle-plugin.version>3.3.0</maven-checkstyle-plugin.version>
+    <maven-checkstyle-plugin.version>3.3.1</maven-checkstyle-plugin.version>
     <maven-clean-plugin.version>3.3.2</maven-clean-plugin.version>
     <maven-compiler-plugin.version>3.11.0</maven-compiler-plugin.version>
     <maven-dependency-plugin.version>3.6.1</maven-dependency-plugin.version>