Update toshimaru/auto-author-assign action to v2.1.2 (#130)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/assign-author.yml

@@ -15,4 +15,4 @@ jobs:
 
     steps:
       - name: Assign author
-        uses: toshimaru/auto-author-assign@v2.1.1
+        uses: toshimaru/auto-author-assign@v2.1.2