Update .gitlab-ci.yml

.gitlab-ci.yml

@@ -75,7 +75,8 @@ stop_testing:
   environment:
     name: test/$CI_COMMIT_REF_NAME
     action: stop
-  except: master
+  except: 
+    - master
   script:
     - rm -f /var/www/test/$CI_COMMIT_REF_NAME
     - rm -f /etc/uwsgi/vassals/$CI_COMMIT_REF_NAME.ini
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