Bump DeterminateSystems/update-flake-lock from 25 to 27

Bumps [DeterminateSystems/update-flake-lock](https://github.com/determinatesystems/update-flake-lock) from 25 to 27.
- [Release notes](https://github.com/determinatesystems/update-flake-lock/releases)
- [Commits](DeterminateSystems/update-flake-lock@v25...v27)

---
updated-dependencies:
- dependency-name: DeterminateSystems/update-flake-lock
  dependency-version: '27'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/update-hydra-spec.yaml

@@ -13,7 +13,7 @@ jobs:
       - name: Install Nix
         uses: cachix/install-nix-action@v31
       - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@v25
+        uses: DeterminateSystems/update-flake-lock@v27
         with:
           inputs: hydra-spec
           token: ${{ secrets.GH_TOKEN_FOR_UPDATES }}