ci: bump toshimaru/auto-author-assign from v1.1.2 to v1.2.0 (#75)

Bumps [toshimaru/auto-author-assign](https://github.com/toshimaru/auto-author-assign) from v1.1.2 to v1.2.0.
- [Release notes](https://github.com/toshimaru/auto-author-assign/releases)
- [Commits](toshimaru/auto-author-assign@v1.1.2...f15fd7c)

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

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

.github/workflows/auto-author-assign.yml

@@ -12,6 +12,6 @@ jobs:
       - uses: actions/checkout@v2
         with:
           ref: refs/pull/${{ github.event.pull_request.number }}/head
-      - uses: toshimaru/auto-author-assign@v1.1.2
+      - uses: toshimaru/auto-author-assign@v1.2.0
         with:
           repo-token: "${{ secrets.GITHUB_TOKEN }}"