Fix the section how to create a workflow

kentaro-m · kentaro-m · commit dc20f1929f3b · 2019-10-02T23:40:41.000+09:00
diff --git a/README.md b/README.md
@@ -14,7 +14,7 @@ jobs:
   add-reviews:
     runs-on: ubuntu-latest
     steps:
-      - uses: kentaro-m/auto-assign-action@master
+      - uses: kentaro-m/auto-assign-action@1.0.0-alpha
         with:
           repo-token: "${{ secrets.GITHUB_TOKEN }}"
 ```
