Improve Javadoc update logic in CI pipeline for conditional commits

.gitlab-ci.yml

@@ -74,13 +74,18 @@ javadoc:
     - git config --global user.email "${GITLAB_USEREMAIL}"
     - git fetch origin ${CI_COMMIT_REF_NAME}
     - git checkout ${CI_COMMIT_REF_NAME}
-
   script:
     - rm -rf docs/apidocs
     - mvn javadoc:javadoc -DskipTests -Pjavadoc
     - git add docs/apidocs
-    - git commit -m "Update Javadocs [skip ci]" || echo "No changes to commit"
-    - git push https://${GITLAB_USERNAME}:${CI_PUSH_TOKEN}@gitlab.com/th-schwarz/CloudflareDNS-java.git ${CI_COMMIT_REF_NAME}
+    - |
+      if ! git diff --quiet -- docs/apidocs; then
+        git add docs/apidocs
+        git commit -m "Update Javadocs"
+        git push https://${GITLAB_USERNAME}:${CI_PUSH_TOKEN}@gitlab.com/th-schwarz/CloudflareDNS-java.git ${CI_COMMIT_REF_NAME}
+      else
+        echo "No changes to commit"
+      fi
   when: manual
   rules:
     - if: '$CI_COMMIT_REF_NAME == "develop"'