flake.lock: Update

Flake lock file updates:

• Updated input 'flake-utils':
    'github:numtide/flake-utils/4022d587cbbfd70fe950c1e2083a02621806a725?narHash=sha256-kAuep2h5ajznlPMD9rnQyffWG8EM/C73lejGofXvdM8%3D' (2023-12-04)
  → 'github:numtide/flake-utils/b1d9ab70662946ef0850d488da1c9019f3a9752a?narHash=sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ%3D' (2024-03-11)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/91050ea1e57e50388fa87a3302ba12d188ef723a?narHash=sha256-tRHbnoNI8SIM5O5xuxOmtSLnswEByzmnQcGGyNRjxsE%3D' (2023-12-01)
  → 'github:NixOS/nixpkgs/4f807e8940284ad7925ebd0a0993d2a1791acb2f?narHash=sha256-IiA3jfbR7K/B5%2B9byVi9BZGWTD4VSbWe8VLpp9B/iYk%3D' (2024-09-11)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/1fdfc1689218998460983986501bd65ba5bbee0f?narHash=sha256-zUQTSNujRESm2s0SvL4EXx1l5BqX7VNDAaFWGnaylUY%3D' (2023-12-06)
  → 'github:oxalica/rust-overlay/e9f8641c92f26fd1e076e705edb12147c384171d?narHash=sha256-YfLRPlFZWrT2oRLNAoqf7G3%2BNnUTDdlIJk6tmBU7kXM%3D' (2024-09-14)
• Removed input 'rust-overlay/flake-utils'
• Removed input 'rust-overlay/flake-utils/systems'
• Updated input 'rust-overlay/nixpkgs':
    'github:NixOS/nixpkgs/96ba1c52e54e74c3197f4d43026b3f3d92e83ff9?narHash=sha256-eKyxW4OohHQx9Urxi7TQlFBTDWII%2BF%2Bx2hklDOQPB50%3D' (2023-04-13)
  → 'github:NixOS/nixpkgs/e6cea36f83499eb4e9cd184c8a8e823296b50ad5?narHash=sha256-WdWDpNaq6u1IPtxtYHHWpl5BmabtpmLnMAx0RdJ/vo8%3D' (2024-06-15)