.compose-gitlab-ci.yml: branch name can be also 'ci' to trigger the job

.compose-gitlab-ci.yml

@@ -36,7 +36,7 @@ buildrawlatex:
     paths:
       - static/rawlatex/
   rules:
-    - if: '$CI_COMMIT_BRANCH == "master" || $CI_COMMIT_BRANCH == "main"'
+    - if: '$CI_COMMIT_BRANCH == "master" || $CI_COMMIT_BRANCH == "main" || $CI_COMMIT_BRANCH == "ci"'
       if: '$CI_PIPELINE_SOURCE == "push"'
       # changes:
       #     - rawlatex/*.tex