Update .gitlab-ci.yml

.gitlab-ci.yml

@@ -34,6 +34,6 @@ enforce_readme:
       - git checkout master
       - cat .github/github_disclaimer.md > README.md.new
       - cat README.md >> README.md.new
-      - cp README.md.new README.md
+      - mv README.md.new README.md
       - git commit -am "Enforce github readme"
       - git push origin master
\ No newline at end of file