Add rebase action

Author: J12934

.github/workflows/rebase.yaml

@@ -0,0 +1,12 @@
+on: issue_comment
+name: Automatic Rebase
+jobs:
+  rebase:
+    name: Rebase
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: Automatic Rebase
+      uses: cirrus-actions/rebase@1.2
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}