move rebase bot to workflows folder

Author: aminya

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

@@ -5,14 +5,14 @@ name: Automatic Rebase
 jobs:
   rebase:
     name: Rebase
-    if: github.event.issue.pull_request != '' && github.event.comment.author_association == 'MEMBER' && contains(github.event.comment.body, '/rebase')
+    if: github.event.issue.pull_request != '' && github.event.comment.author_association == 'OWNER' && contains(github.event.comment.body, '/rebase')
     runs-on: ubuntu-latest
     steps:
     - name: Checkout the latest code
       uses: actions/checkout@v2
       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 }}