Bump cachix/install-nix-action from 25 to 27

Bumps [cachix/install-nix-action](https://github.com/cachix/install-nix-action) from 25 to 27.
- [Release notes](https://github.com/cachix/install-nix-action/releases)
- [Commits](cachix/install-nix-action@v25...V27)

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

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

.github/workflows/check.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ${{ matrix.runsOn }}
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v25
+      - uses: cachix/install-nix-action@V27
       - uses: cachix/cachix-action@v14
         with:
           name: igm
@@ -37,7 +37,7 @@ jobs:
     runs-on: ${{ matrix.runsOn }}
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v25
+      - uses: cachix/install-nix-action@V27
       - uses: cachix/cachix-action@v14
         with:
           name: igm
@@ -58,7 +58,7 @@ jobs:
     steps:
       - run: sudo apt-get clean
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v25
+      - uses: cachix/install-nix-action@V27
       - uses: cachix/cachix-action@v14
         with:
           name: igm
@@ -74,7 +74,7 @@ jobs:
     runs-on: ${{ matrix.runsOn }}
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v25
+      - uses: cachix/install-nix-action@V27
       - uses: cachix/cachix-action@v14
         with:
           name: igm