Update README (#33)

Author: jarrodmillman

README.md

@@ -81,7 +81,7 @@ jobs:
  name: attach to PR
  runs-on: ubuntu-latest
  steps:
- - uses: scientific-python/attach-next-milestone-action@f94a5235518d4d34911c41e19d780b8e79d42238
+ - uses: scientific-python/attach-next-milestone-action@bc07be829f693829263e57d5e8489f4e57d3d420
  with:
  token: ${{ secrets.MILESTONE_LABELER_TOKEN }}
  force: true