ci(github): update auto-approve.yml

Author: remarkablemark

.github/workflows/auto-approve.yml

@@ -12,7 +12,7 @@ jobs:
         run: gh pr review --approve $PR_URL
         env:
           PR_URL: ${{ github.event.pull_request.html_url }}
-          GITHUB_TOKEN: ${{ github.token }}
+          GH_TOKEN: ${{ github.token }} # or `GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}`
 
       # https://github.com/hmarr/auto-approve-action
       - name: Auto Approve