flake.lock: Update

Flake lock file updates:

• Updated input 'flake-utils':
    'github:numtide/flake-utils/b1d9ab70662946ef0850d488da1c9019f3a9752a' (2024-03-11)
  → 'github:numtide/flake-utils/c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a' (2024-09-17)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/574d1eac1c200690e27b8eb4e24887f8df7ac27c' (2024-09-06)
  → 'github:nixos/nixpkgs/c04d5652cfa9742b1d519688f65d1bbccea9eb7e' (2024-09-19)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/8cc45e678e914a16c8e224c3237fb07cf21e5e54' (2024-09-07)
  → 'github:oxalica/rust-overlay/a66e16cb21e4428224925dbf1b66238c727dda0a' (2024-09-21)