update workflow

.gitea/workflows/flake-check.yml

@@ -5,10 +5,10 @@ jobs:
   flake-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - name: Check Nix flake inputs
-        uses: DeterminateSystems/flake-checker-action@v4 # This action
-      - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v3
-      - name: Build default package
-        run: nix flake check
+    - uses: actions/checkout@v4
+    - name: Install dependencies for Nix setup action
+      run: |
+        apt update -y
+        apt install sudo -y                
+    - uses: cachix/install-nix-action@v30
+    - run: nix build .#