ci: use USERSTYLES_TOKEN to push

https://github.com/stefanzweifel/git-auto-commit-action#push-to-protected-branches

.github/workflows/generate.yml

@@ -16,6 +16,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
         with:
+          token: ${{ secrets.USERSTYLES_TOKEN }}
           ref: ${{ github.ref }}
 
       - name: Set up Deno