Change ref name

Author: Jacques Xing

.github/workflows/trigger-gilab-ci.yml

@@ -14,7 +14,7 @@ jobs:
         url: https://gitlab.nektar.info
         project_id: 364
         token: ${{ secrets.GITHUB_TOKEN }}
-        ref_name: ${{ github.ref }}
+        ref_name: main
     - name: Print GitLab pipeline URL
       run: |
         echo web_url=${{ steps.trigger.outputs.web_url }}