Properly use sponsors PR token

Author: jesseduffield

.github/workflows/sponsors.yml

@@ -26,5 +26,4 @@ jobs:
           author: "github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>"
           labels: "ignore-for-release"
           delete-branch: true
-        env:
-          GITHUB_TOKEN: ${{ secrets.SPONSORS_PR_TOKEN }}
+          token: ${{ secrets.SPONSORS_PR_TOKEN }} }}