Merge pull request #160 from getsentry/asottile-sentry-patch-1

gh cli needs `GH_TOKEN`

Author: asottile-sentry

.github/workflows/auto-merge.yml

@@ -13,3 +13,4 @@ jobs:
         gh pr merge --repo "$GITHUB_REPOSITORY" "$PR"
       env:
         PR: ${{ github.event.number }}
+        GH_TOKEN: ${{ github.token }}