flake.lock: Update

Flake lock file updates:

• Updated input 'flake-utils':
    'github:numtide/flake-utils/1ef2e671c3b0c19053962c07dbda38332dcebf26' (2024-01-15)
  → 'github:numtide/flake-utils/d465f4819400de7c8d874d50b982301f28a84605' (2024-02-28)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/cbc4211f0afffe6dfd2478a62615dd5175a13f9a' (2024-02-23)
  → 'github:nixos/nixpkgs/9df3e30ce24fd28c7b3e2de0d986769db5d6225d' (2024-03-06)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/9b24383d77f598716fa0cbb8b48c97249f5ee1af' (2024-02-24)
  → 'github:oxalica/rust-overlay/d3a05d053b145349b8ad395741c5951f332280ef' (2024-03-09)