flake.lock: Update

Flake lock file updates:

• Updated input 'crane':
    'github:ipetkov/crane/c873fd2ad80e32cd2c427df5a248a3f7baafc1ae?narHash=sha256-2Yt/0zGpJ784h0rffj9fQTyqflJkNPmW7gsmPknluus%3D' (2024-08-04)
  → 'github:ipetkov/crane/4c6c77920b8d44cd6660c1621dea6b3fc4b4c4f4?narHash=sha256-NhCkJJQhD5GUib8zN9JrmYGMwt4lCRp6ZVNzIiYCl0Y%3D' (2024-08-06)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/f3834de3782b82bfc666abf664f946d0e7d1f116?narHash=sha256-X6U%2Bw8qFBuGPCYrZzc9mpN34aRjQ8604MonpBUkj908%3D' (2024-08-04)
  → 'github:nixos/nixpkgs/2a13929e1f191b3690dd2f2db13098b04adb9043?narHash=sha256-SQ0TCC4aklOhN/OzcztrKqDLY8SjpIZcyvTulzhDXs0%3D' (2024-08-06)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/a8a937c304e62a5098c6276c9cdf65c19a43b1a5?narHash=sha256-2k3/geD5Yh8JT1nrGaRycje5kB0DkvQA/OUZoel1bIU%3D' (2024-08-05)
  → 'github:oxalica/rust-overlay/d720bf3cebac38c2426d77ee2e59943012854cb8?narHash=sha256-8Pncp8IKd0f0N711CRrCGTC4iLfBE%2B/5kaMqyWxnYic%3D' (2024-08-07)