flake.lock: Update (#268)

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/930afdff0d11e60fa5956947513feb57463284af?narHash=sha256-wyprFbiEQfc3iopAXEtyxrQpxKTv3bByEZQno8GiN5I%3D' (2024-09-10)
  → 'github:nix-community/fenix/8f14b37d4ad9eafd33315ba67faded5c1e1a1044?narHash=sha256-W68/drb51fBhOl/BMOoRlI%2B7qxeoNWGmCZwAyuXVlQY%3D' (2024-09-14)
• Updated input 'fenix/nixpkgs':
    'github:nixos/nixpkgs/574d1eac1c200690e27b8eb4e24887f8df7ac27c?narHash=sha256-v3rIhsJBOMLR8e/RNWxr828tB%2BWywYIoajrZKFM%2B0Gg%3D' (2024-09-06)
  → 'github:nixos/nixpkgs/4f807e8940284ad7925ebd0a0993d2a1791acb2f?narHash=sha256-IiA3jfbR7K/B5%2B9byVi9BZGWTD4VSbWe8VLpp9B/iYk%3D' (2024-09-11)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/e35227d186acd47d8e5f78cbd792d57ddf47d74b?narHash=sha256-7bsWAKG/otbHj7wmCBrJ9P6ve2MFcoOlIh6wcx6ffKg%3D' (2024-09-09)
  → 'github:rust-lang/rust-analyzer/4221354a8fe90ea8218d3757d14735eac08d3e81?narHash=sha256-0Cb2bK2eyZ1njSX3593USMlcrj94VZprNN1/HllIfgw%3D' (2024-09-13)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/574d1eac1c200690e27b8eb4e24887f8df7ac27c?narHash=sha256-v3rIhsJBOMLR8e/RNWxr828tB%2BWywYIoajrZKFM%2B0Gg%3D' (2024-09-06)
  → 'github:NixOS/nixpkgs/4f807e8940284ad7925ebd0a0993d2a1791acb2f?narHash=sha256-IiA3jfbR7K/B5%2B9byVi9BZGWTD4VSbWe8VLpp9B/iYk%3D' (2024-09-11)