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](https://github.com/determinatesystems/update-flake-lock/compare/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] <support@github.com>

.github/workflows/update.yml

@@ -24,7 +24,7 @@ jobs:
           extraPullNames: rstats-on-nix, nix-community
       - run: cd templates/rde/ && nix develop -c p-updateDeps
       - name: Update n flake.lock
-        uses: DeterminateSystems/update-flake-lock@v27
+        uses: DeterminateSystems/update-flake-lock@v28
         with:
           token: ${{ secrets.GH_TOKEN_FOR_UPDATES }}
           branch: update_rde