Add --print-build-logs to nix flake check

Author: ahojukka5

.github/workflows/CI.yml

@@ -15,5 +15,5 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: cachix/install-nix-action@v22
-      - run: nix flake check
+      - run: nix flake check --print-build-logs
       - run: nix run .#test