Create auto-assign.yaml

.github/workflows/auto-assign.yaml

@@ -0,0 +1,10 @@
+name: 'Auto Assign'
+on:
+  pull_request:
+    types: [opened, ready_for_review]
+
+jobs:
+  add-reviews:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: kentaro-m/auto-assign-action@v1.2.1