simplify action

.github/workflows/tfdocs.yaml

@@ -4,16 +4,4 @@ on:
 
 jobs:
   generate-tfdocs:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-      with:
-        ref: ${{ github.event.pull_request.head.ref }}
-
-    - name: Render terraform docs inside the README.md and push changes back to PR branch
-      uses: terraform-docs/[email protected]
-      with:
-        working-dir: .
-        output-file: README.md
-        output-method: inject
-        git-push: "true"
+    uses: montblu/github-actions/.github/workflows/tfdocs.yaml@main