nix: update flake.lock (#5969)
Flake lock file updates:
• Updated input 'nixpkgs':
'github:NixOS/nixpkgs/1536926ef5621b09bba54035ae2bb6d806d72ac8' (2024-02-29)
→ 'github:NixOS/nixpkgs/9df3e30ce24fd28c7b3e2de0d986769db5d6225d' (2024-03-06)
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
