build(deps): bump DeterminateSystems/flake-checker-action from 4 to 5

Bumps [DeterminateSystems/flake-checker-action](https://github.com/determinatesystems/flake-checker-action) from 4 to 5.
- [Release notes](https://github.com/determinatesystems/flake-checker-action/releases)
- [Commits](DeterminateSystems/flake-checker-action@v4...v5)

---
updated-dependencies:
- dependency-name: DeterminateSystems/flake-checker-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/check.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: DeterminateSystems/magic-nix-cache-action@v2
       - uses: DeterminateSystems/nix-installer-action@v4
       - name: Check flake lockfile
-        uses: DeterminateSystems/flake-checker-action@v4
+        uses: DeterminateSystems/flake-checker-action@v5
       - name: Check flake outputs
         run: |
           nix flake check --impure --no-build