flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/c3aa7b8938b17aebd2deecf7be0636000d62a2b9?narHash=sha256-med8%2B5DSWa2UnOqtdICndjDAEjxr5D7zaIiK4pn0Q7c%3D' (2024-08-14)
  → 'github:nixos/nixpkgs/c374d94f1536013ca8e92341b540eba4c22f9c62?narHash=sha256-Z/ELQhrSd7bMzTO8r7NZgi9g5emh%2BaRKoCdaAv5fiO0%3D' (2024-08-21)
• Updated input 'pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/c7012d0c18567c889b948781bc74a501e92275d1?narHash=sha256-qbhjc/NEGaDbyy0ucycubq4N3//gDFFH3DOmp1D3u1Q%3D' (2024-08-09)
  → 'github:cachix/pre-commit-hooks.nix/c8a54057aae480c56e28ef3e14e4960628ac495b?narHash=sha256-9etXEOUtzeMgqg1u0wp%2BEdwG7RpmrAZ2yX516bMj2aE%3D' (2024-08-23)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/6e75319846684326d900daff1e2e11338cc80d2b?narHash=sha256-WzeUR1MG9MnJnh9T7qcVe/v12qHvJvzdc3Z5HCeE2ns%3D' (2024-08-15)
  → 'github:oxalica/rust-overlay/2b5b3edd96ef336b00622dcabc13788fdef9e3ca?narHash=sha256-ltKuK6shQ64uej1mYNtBsDYxttUNFiv9AcHqk0%2B0NQM%3D' (2024-08-24)