chore(deps): bump cachix/install-nix-action from 25 to 26

Bumps [cachix/install-nix-action](https://github.com/cachix/install-nix-action) from 25 to 26.
- [Release notes](https://github.com/cachix/install-nix-action/releases)
- [Commits](cachix/install-nix-action@v25...v26)

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

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

.github/workflows/test.yml

@@ -21,7 +21,7 @@ jobs:
     - run: yarn build
     # check if typescript generation was committed
     - run: git diff --exit-code
-    - uses: cachix/install-nix-action@v25
+    - uses: cachix/install-nix-action@v26
     - name: Test public cache
       uses: ./
       with:
@@ -40,7 +40,7 @@ jobs:
     - uses: actions/checkout@v4
     - run: yarn install --frozen-lockfile
     - run: yarn build
-    - uses: cachix/install-nix-action@v25
+    - uses: cachix/install-nix-action@v26
     - name: Test public cache no signing key
       uses: ./
       with:
@@ -59,7 +59,7 @@ jobs:
     - uses: actions/checkout@v4
     - run: yarn install --frozen-lockfile
     - run: yarn build
-    - uses: cachix/install-nix-action@v25
+    - uses: cachix/install-nix-action@v26
     - name: Test private cache
       uses: ./
       with:
@@ -78,7 +78,7 @@ jobs:
     - uses: actions/checkout@v4
     - run: yarn install --frozen-lockfile
     - run: yarn build
-    - uses: cachix/install-nix-action@v25
+    - uses: cachix/install-nix-action@v26
     - name: Test private cache
       uses: ./
       with:
@@ -95,7 +95,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Install Nix
-      uses: cachix/install-nix-action@v25
+      uses: cachix/install-nix-action@v26
       with:
         nix_path: nixpkgs=channel:nixos-22.11
         install_url: https://nixos-nix-install-tests.cachix.org/serve/kkq45x7yrzvxq8627fi6hkswnfa7mg2l/install