Merge pull request #233 from jenkinsci/dependabot/maven/com.puppycrawl.tools-checkstyle-10.21.1

Bump com.puppycrawl.tools:checkstyle from 10.17.0 to 10.21.1

Author: mawinter69

pom.xml

@@ -46,7 +46,7 @@
     <jenkins.baseline>2.440</jenkins.baseline>
     <jenkins.version>${jenkins.baseline}.3</jenkins.version>
     <powermock.version>1.6.1</powermock.version>
-    <checkstyle.version>10.17.0</checkstyle.version>
+    <checkstyle.version>10.21.1</checkstyle.version>
     <hpi.compatibleSinceVersion>2.0</hpi.compatibleSinceVersion>
   </properties>