add release.yml

Author: smdn

.github/release.yml

@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: MIT
+# SPDX-FileCopyrightText: "2025 smdn <smdn@smdn.jp>"
+
+# ref: https://docs.github.com/repositories/releasing-projects-on-github/automatically-generated-release-notes
+changelog:
+  categories:
+    - title: Notable changes (may include changes not directly related)
+      labels:
+        - "*"
+      exclude:
+        labels:
+          - dependencies
+    - title: Dependencies
+      labels:
+        - dependencies