chore(deps): Bump DeterminateSystems/flake-checker-action from 5 to 8

Bumps [DeterminateSystems/flake-checker-action](https://github.com/determinatesystems/flake-checker-action) from 5 to 8.
- [Release notes](https://github.com/determinatesystems/flake-checker-action/releases)
- [Commits](DeterminateSystems/flake-checker-action@v5...v8)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/flake.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Check Nix flake inputs
-        uses: DeterminateSystems/flake-checker-action@v5 # This action
+        uses: DeterminateSystems/flake-checker-action@v8 # This action
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@v9
       - name: Nix Flake Check