build(deps): bump toshimaru/auto-author-assign from 1.6.2 to 2.1.0

Bumps [toshimaru/auto-author-assign](https://github.com/toshimaru/auto-author-assign) from 1.6.2 to 2.1.0.
- [Release notes](https://github.com/toshimaru/auto-author-assign/releases)
- [Changelog](https://github.com/toshimaru/auto-author-assign/blob/main/CHANGELOG.md)
- [Commits](toshimaru/auto-author-assign@v1.6.2...v2.1.0)

---
updated-dependencies:
- dependency-name: toshimaru/auto-author-assign
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/assign-pr.yml

@@ -7,4 +7,4 @@ jobs:
   assign_creator:
     runs-on: ubuntu-latest
     steps:
-      - uses: toshimaru/auto-author-assign@v1.6.2
+      - uses: toshimaru/auto-author-assign@v2.1.0