flake.lock: Update

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/abc0549e3560189462a7d394cc9d50af4608d103' (2024-07-08)
  → 'github:nix-community/fenix/286f371b3cfeaa5c856c8e6dfb893018e86cc947' (2024-08-02)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/a5b21ea0aa644dffd7cf958b43f11f221d53404e' (2024-07-07)
  → 'github:rust-lang/rust-analyzer/f149dc5029d8406fae8b2c541603bcac06e30deb' (2024-08-01)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/655a58a72a6601292512670343087c2d75d859c1' (2024-07-08)
  → 'github:nixos/nixpkgs/9f918d616c5321ad374ae6cb5ea89c9e04bf3e58' (2024-07-31)

Author: astro