chore(deps): bump nixbuild/nix-quick-install-action from 26 to 28

Bumps [nixbuild/nix-quick-install-action](https://github.com/nixbuild/nix-quick-install-action) from 26 to 28.
- [Release notes](https://github.com/nixbuild/nix-quick-install-action/releases)
- [Changelog](https://github.com/nixbuild/nix-quick-install-action/blob/master/RELEASE)
- [Commits](nixbuild/nix-quick-install-action@v26...v28)

---
updated-dependencies:
- dependency-name: nixbuild/nix-quick-install-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/haddock.yml

@@ -15,7 +15,7 @@ jobs:
       name: github-pages
     steps:
       - uses: actions/checkout@v4
-      - uses: nixbuild/nix-quick-install-action@v26
+      - uses: nixbuild/nix-quick-install-action@v28
         with:
           nix_conf: |
             experimental-features = nix-command flakes

.github/workflows/script-evaluation-dump.yml

@@ -22,7 +22,7 @@ jobs:
           ref: zliu41/dump-1.35.4
 
       - name: Quick Install Nix
-        uses: nixbuild/nix-quick-install-action@v26
+        uses: nixbuild/nix-quick-install-action@v28
         with:
           # 2.14.1 seems to have issues, see https://github.com/nixbuild/nix-quick-install-action/issues/29
           nix_version: '2.13.3'