Update README.md

Author: pascalgn

README.md

@@ -57,15 +57,15 @@ on:
     types:
       - completed
   status: {}
-permissions:
-  contents: write
 jobs:
   automerge:
     runs-on: ubuntu-latest
     steps:
       - id: automerge
         name: automerge
         uses: "pascalgn/automerge-action@v0.16.2"
+        permissions:
+          contents: write
         env:
           GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
 ```