chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/test.yml

@@ -29,7 +29,7 @@ jobs:
 
     steps:
     - name: Git Checkout
-      uses: actions/checkout@v5  # https://github.com/actions/checkout
+      uses: actions/checkout@v6  # https://github.com/actions/checkout
 
     - name: Install uv
       uses: astral-sh/setup-uv@v6