chore(deps): update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/test.yml

@@ -6,7 +6,7 @@ jobs:
   tests:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: cachix/install-nix-action@v31
       - uses: cachix/cachix-action@v16
         with: