flake.lock: Update

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/761431323e30846bae160e15682cfa687c200606' (2024-02-17)
  → 'github:nix-community/fenix/a941fe943bd7c4c683d8aa8e1a3a1d0595516051' (2024-02-24)
• Updated input 'fenix/nixpkgs':
    'github:nixos/nixpkgs/a4d4fe8c5002202493e87ec8dbc91335ff55552c' (2024-02-15)
  → 'github:nixos/nixpkgs/cbc4211f0afffe6dfd2478a62615dd5175a13f9a' (2024-02-23)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/b9b0d29b8e69b02457cfabe20c4c69cdb45f3cc5' (2024-02-15)
  → 'github:rust-lang/rust-analyzer/03b3cb6be9f21c082f4206b35c7fe7f291c94eaa' (2024-02-23)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/69405156cffbdf2be50153f13cbdf9a0bea38e49' (2024-02-17)
  → 'github:NixOS/nixpkgs/89a2a12e6c8c6a56c72eb3589982c8e2f89c70ea' (2024-02-25)
• Updated input 'nixpkgs-master':
    'github:NixOS/nixpkgs/347a8ce65b6747babcd4e037314f6c6565912c2a' (2024-02-18)
  → 'github:NixOS/nixpkgs/7794d8a78570335f10b0f97ae72b14b33c6addc2' (2024-02-24)