making the lint stage print out the pipeline ID as a test

.gitlab-ci.yml

@@ -18,6 +18,7 @@ lint_python_on_merge_request:
     script:
      - echo "Linting Python code"
      - pip install --upgrade -q pip && pip install -q black && black --fast --check .
+     - echo $CI_JOB_ID
 
 build_and_push_container:
   stage: deploy