Bump DeterminateSystems/update-flake-lock from 27 to 28

Bumps [DeterminateSystems/update-flake-lock](https://github.com/determinatesystems/update-flake-lock) from 27 to 28.
- [Release notes](https://github.com/determinatesystems/update-flake-lock/releases)
- [Commits](DeterminateSystems/update-flake-lock@c5930b3...834c491)

---
updated-dependencies:
- dependency-name: DeterminateSystems/update-flake-lock
  dependency-version: '28'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/update-flake-lock.yml

@@ -16,4 +16,4 @@ jobs:
           ssh-key: ${{ secrets.UPDATE_FLAKE_LOCK_SSH_KEY }}
       - uses: DeterminateSystems/nix-installer-action@786fff0690178f1234e4e1fe9b536e94f5433196 # v20
       - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@c5930b397a673a70ca70be06020e943aeac310a1 # v27
+        uses: DeterminateSystems/update-flake-lock@834c491b2ece4de0bbd00d85214bb5e83b4da5c6 # v28