Prevent deploy job from failing when there is nothing to commit

Fixes: !635

JIRA: INTERNAL

Introduce a quick change to the git commit step of the job to prevent
the runner from failing when there is nothing to commit

Signed-off-by: Derek Barbosa <debarbos@redhat.com>

Author: Derek Barbosa

.gitlab-ci.yml

@@ -142,7 +142,8 @@ deploy:
     - git config user.name "Gitlab Runner"
     - git config user.email ""
     - git add info/owners.yaml info/RHMAINTAINERS info/CODEOWNERS
-    - git commit -m "[Gitlab CI/CD] Automated rebuild of info/*"
+    # make it so that job will not fail if there is nothing to commit
+    - git diff-index --quiet HEAD || git commit -m "[Gitlab CI/CD] Automated rebuild of info/*"
     - git push https://gitlab-ci-token:$MAKE_MAINT@gitlab.com/redhat/centos-stream/src/kernel/documentation.git '$CI_DEFAULT_BRANCH'
 
   rules: