chore: bump astral-sh actions to latest major versions

ruff-action v3 → v4, setup-uv v7 → v8

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/release.yml

@@ -37,7 +37,7 @@ jobs:
           fetch-depth: 0
 
       - name: Install uv
-        uses: astral-sh/setup-uv@v7
+        uses: astral-sh/setup-uv@v8
 
       - name: Set up Python
         run: uv python install 3.13