update with actions for syncing gitlab

Author: kirankandel

.github/workflows/main.yaml

@@ -0,0 +1,14 @@
+name: Sync Repo to GitLab
+
+on:
+  push
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: keninkujovic/gitlab-sync@2.0.0
+      with:
+        gitlab_url: ${{ secrets.GITLAB_URL }}
+        username: ${{ secrets.USERNAME }}
+        gitlab_pat: ${{ secrets.PAT }}