build(deps): 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@v27...v28)

---
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.yaml

@@ -16,7 +16,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - uses: DeterminateSystems/[email protected]
-      - uses: DeterminateSystems/update-flake-lock@v27
+      - uses: DeterminateSystems/update-flake-lock@v28
         with:
           pr-title: Update Nix flake inputs
           pr-labels: |