changed action

.gitea/workflows/nix-check.yaml

@@ -1,4 +1,4 @@
-name: Format Nix Flake
+name: Verify Nix Flake Build
 
 on:
   push:
@@ -7,16 +7,13 @@ on:
     branches: [master]
 
 jobs:
-  format:
+  verify_build:
     runs-on: ubuntu-latest
-
     steps:
       - uses: actions/checkout@v4
-
       - name: Install Nix
         uses: cachix/install-nix-action@v2
         with:
-          nix_version: '2.18.1' # or desired Nix version
-
-      - name: Format Nix Flake
-        run: nix fmt
+          nix_version: '2.18.1'
+      - name: Verify Nix Flake
+        run: nix flake check