updated checkout-task in github-workflow

.github/workflows/autolint.yml

@@ -18,10 +18,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-
-      - name: Switch to Current Branch
-        run: git checkout ${{ env.BRANCH }}
-        shell: bash
+        with:
+          ref: ${{ github.ref }}
 
       - name: Install python
         uses: actions/setup-python@v4