Update README

README.md

@@ -18,6 +18,7 @@ Add the following step at the end of your job.
     commit_author_email: john.doe@example.com
     commit_author_name: John Doe
     commit_message: Apply automatic changes
+    ref: ${{ github.head_ref }}
   env:
     GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 ```
@@ -32,6 +33,7 @@ The following inputs are required
 - `commit_author_email`: The Commit Authors Email Address
 - `commit_author_name`: The Commit Authors Name
 - `commit_message`: The commit message used when changes are available
+- `ref`: Branch where changes should be pushed too
 
 ### Environment Variables