Merge pull request #250 from rribeiro1/fix-docs

docs: fix auto-merge example

README.md

@@ -142,7 +142,7 @@ jobs:
         run: gh pr merge --auto --merge "$PR_URL"
         env:
           PR_URL: ${{github.event.pull_request.html_url}}
-          GITHUB_TOKEN: ${{secrets.PAT_TOKEN}}
+          GH_TOKEN: ${{secrets.GITHUB_TOKEN}}
 ```
 
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