flake.lock: Update

Flake lock file updates:

• Updated input 'flake-utils':
    'github:numtide/flake-utils/1ef2e671c3b0c19053962c07dbda38332dcebf26' (2024-01-15)
  → 'github:numtide/flake-utils/b1d9ab70662946ef0850d488da1c9019f3a9752a' (2024-03-11)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/3030f185ba6a4bf4f18b87f345f104e6a6961f34' (2024-03-09)
  → 'github:nixos/nixpkgs/d691274a972b3165335d261cc4671335f5c67de9' (2024-03-14)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/4ee92bf124fbc4e157cbce1bc2a35499866989fc' (2024-02-16)
  → 'github:oxalica/rust-overlay/42baa9e2e4713572d7481f917243b07dffdf54b8' (2024-03-16)

Author: github-actions[bot]