chore: add auto-release action

Author: kagawagao

.github/workflows/auto-release.yml

@@ -0,0 +1,18 @@
+name: "auto-release"
+
+on:
+  push:
+    tags:
+      - "v*"
+
+jobs:
+  tagged-release:
+    name: "Tagged Release"
+    runs-on: "ubuntu-latest"
+
+    steps:
+      - uses: "marvinpinto/action-automatic-releases@latest"
+        with:
+          repo_token: "${{ secrets.GITHUB_TOKEN }}"
+          prerelease: false
+          automatic_release_tag: latest