fix submitting to opam-updater

buildjob

@@ -68,7 +68,7 @@ if [[ -n "$OPAM_PKG" && "$CI_COMMIT_REF_NAME" == "${OPAM_PKG_BRANCH:-master}" ]]
     # Trigger opam updater
     curl --fail -sS -X POST https://gitlab.mpi-sws.org/api/v4/projects/581/trigger/pipeline \
          -F "token=$OPAM_UPDATE_SECRET" \
-         -F "ref=master" \ # the branch we trigger on the other end
+         -F "ref=master" \
          -F "variables[REPO]=$CI_PROJECT_URL.git" \
          -F "variables[REF]=$CI_COMMIT_REF_NAME" \
          -F "variables[SHA]=$CI_COMMIT_SHA" \