Build by JDK 21 in order to deploy

jenkins-lib deploy by JDK 21
https://github.com/apache/maven-jenkins-lib/pull/10
diff --git a/Jenkinsfile b/Jenkinsfile
index 40705a8..65862ed 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -17,4 +17,4 @@
  * under the License.
  */
 
-asfMavenTlpStdBuild(jdks:['17'])
+asfMavenTlpStdBuild(jdks:['21'])