Merge pull request #638 from jenkinsci/dependabot/maven/master/com.diffplug.spotless-spotless-maven-plugin-2.22.4

Author: dependabot[bot]

pom.xml

@@ -139,7 +139,7 @@
         <plugin>
           <groupId>com.diffplug.spotless</groupId>
           <artifactId>spotless-maven-plugin</artifactId>
-          <version>2.22.3</version>
+          <version>2.22.4</version>
           <configuration>
             <!-- define a language-specific format -->
             <java>