Update README.md

Author: pascalgn

README.md

@@ -66,7 +66,7 @@ jobs:
     steps:
       - id: automerge
         name: automerge
-        uses: "pascalgn/automerge-action@v0.16.3"
+        uses: "pascalgn/automerge-action@v0.16.4"
         env:
           GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
 ```