Update GitHub Actions to use newer action versions

Author: fswair

.github/workflows/test.yml

@@ -14,10 +14,10 @@ jobs:
         python-version: ["3.11", "3.12", "3.13"]
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Install uv
-      uses: astral-sh/setup-uv@v5
+      uses: astral-sh/setup-uv@v7
       with:
         enable-cache: true