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

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -7,7 +7,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: DeterminateSystems/nix-installer-action@v10
       - uses: DeterminateSystems/magic-nix-cache-action@v4
       - run: nix develop --impure --command pre-commit run --all
@@ -24,7 +24,7 @@ jobs:
           - "3.11"
           - "3.12"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: "${{matrix.python-version}}"