chore: bump CI actions to Node 24-ready versions (checkout@v5, setup-uv@v6)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: jamwithai

.github/workflows/ci.yml

@@ -9,10 +9,10 @@ jobs:
   checks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Install uv
-        uses: astral-sh/setup-uv@v5
+        uses: astral-sh/setup-uv@v6
         with:
           python-version: "3.12"