fix(ci): limit --max-jobs of nix-fast-build to 8 to prevent OOM while running nix flake check

Author: yvan-sraka

.github/workflows/nix-build.yml

@@ -70,7 +70,7 @@ jobs:
         name: Build psql bundle
         run: >
           nix run "github:Mic92/nix-fast-build?rev=b1dae483ab7d4139a6297e02b6de9e5d30e43d48" 
-          -- --skip-cached --no-nom ${{ matrix.runner == 'macos-latest-xlarge' && '--max-jobs 1' || '' }}
+          -- --skip-cached --no-nom --max-jobs ${{ matrix.runner == 'macos-latest-xlarge' && '1' || '8' }}
           --flake ".#checks.$(nix eval --raw --impure --expr 'builtins.currentSystem')"
         env:
           AWS_ACCESS_KEY_ID: ${{ env.AWS_ACCESS_KEY_ID }}