flake.lock: Update (#285)

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/24002092be13b2efe87700229d143b0d1eaa5d12' (2024-03-09)
  → 'github:nix-community/fenix/b06c3b4110bfb731d8b84b35cc5f7e00e63b37ed' (2024-03-16)
• Updated input 'fenix/nixpkgs':
    'github:nixos/nixpkgs/9df3e30ce24fd28c7b3e2de0d986769db5d6225d' (2024-03-06)
  → 'github:nixos/nixpkgs/d691274a972b3165335d261cc4671335f5c67de9' (2024-03-14)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/2397e7a887252aa995d3790164b34b6c76ed94b4' (2024-03-08)
  → 'github:rust-lang/rust-analyzer/d7ec7a5441190b4fde399b2ac3a8d9daaf062e1c' (2024-03-15)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/d503ebacda199d03f06f71ff776545e53700ec84' (2024-03-10)
  → 'github:NixOS/nixpkgs/6dc11d9859d6a18ab0c5e5829a5b8e4810658de3' (2024-03-16)
• Updated input 'nixpkgs-master':
    'github:NixOS/nixpkgs/187a4d6ffc74a65cb55891a2d011fb9aacb4f6ec' (2024-03-10)
  → 'github:NixOS/nixpkgs/ec6f663ee793c285c5151c8adda7706ebbe27298' (2024-03-17)