Merge pull request 'build with java 17 again' (#12) from downgrade-java into master

Reviewed-on: https://git.ozg-sh.de/ozgcloud-lib/api-lib/pulls/12

Jenkinsfile

@@ -3,7 +3,7 @@ def FAILED_STAGE
 pipeline {
     agent {
        node {
-           label 'ozgcloud-jenkins-build-agent-jdk21'
+           label 'jenkins-build-agent'
         }
     }