chore: bump toshimaru/auto-author-assign from 1.5.0 to 1.5.1 (#936)

Bumps [toshimaru/auto-author-assign](https://github.com/toshimaru/auto-author-assign) from 1.5.0 to 1.5.1.
- [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@v1.5.0...v1.5.1)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/pr_author_auto_assign.yaml

@@ -13,6 +13,6 @@ jobs:
   assign-author:
     runs-on: ubuntu-latest
     steps:
-      - uses: toshimaru/auto-author-assign@v1.5.0
+      - uses: toshimaru/auto-author-assign@v1.5.1
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}