Updated nix

Author: guillemcordoba

.github/workflows/build-nix-app.yaml

@@ -2,7 +2,7 @@ name: "build-nix-app"
 on:
   # Trigger the workflow on push or pull request,
   # but only for the main branch
-  push: 
+  push:
     branches: [ main, main-0.4 ]
   pull_request:
     branches: [ main, main-0.4 ]
@@ -22,10 +22,10 @@ jobs:
         uses: ./.github/actions/extend-space
 
       - name: Install nix
-        uses: cachix/install-nix-action@v27
+        uses: cachix/install-nix-action@v31
         with:
           github_access_token: ${{ secrets.GITHUB_TOKEN }}
-          nix_path: nixpkgs=channel:nixos-24.05
+          nix_path: nixpkgs=channel:nixos-25.05
 
       - uses: cachix/cachix-action@v15
         with: