Merge pull request #2088 from kubernetes-client/dependabot/maven/org.apache.maven.plugins-maven-compiler-plugin-3.9.0

Bump maven-compiler-plugin from 3.8.1 to 3.9.0

Author: k8s-ci-robot

pom.xml

@@ -355,7 +355,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-compiler-plugin</artifactId>
-          <version>3.8.1</version>
+          <version>3.9.0</version>
         </plugin>
         <plugin>
           <groupId>org.sonatype.plugins</groupId>