add documentation for ansible bug

.gitlab-ci.yml

@@ -6,5 +6,7 @@ before_script:
 ansible-lint:
   script:
     # fix weird ansible bug
+    # https://github.com/trailofbits/algo/issues/1637
+    # This probably happens due to gitlab-runner mounting the git repo into the container
     - chmod o-w .
     - ansible-lint