Bump kentaro-m/auto-assign-action from 1.1.1 to 2.0.0

Bumps [kentaro-m/auto-assign-action](https://github.com/kentaro-m/auto-assign-action) from 1.1.1 to 2.0.0.
- [Release notes](https://github.com/kentaro-m/auto-assign-action/releases)
- [Commits](https://github.com/kentaro-m/auto-assign-action/compare/v1.1.1...v2.0.0)

---
updated-dependencies:
- dependency-name: kentaro-m/auto-assign-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/auto_assign_prs.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Set the author of a PR as the assignee
-        uses: kentaro-m/auto-assign-action@v1.1.1
+        uses: kentaro-m/auto-assign-action@v2.0.0
         with:
           configuration-path: ".github/auto-assignees.yml"
           repo-token: "${{ secrets.GITHUB_TOKEN }}"