move rebase bot to workflows folder

Author: aminya

.github/rebase.yml renamed to .github/workflows/rebase.yml

@@ -13,6 +13,6 @@ jobs:
       with:
         fetch-depth: 0
     - name: Automatic Rebase
-      uses: cirrus-actions/rebase@1
+      uses: cirrus-actions/rebase@1.3.1
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}