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/4f807e8940284ad7925ebd0a0993d2a1791acb2f?narHash=sha256-IiA3jfbR7K/B5%2B9byVi9BZGWTD4VSbWe8VLpp9B/iYk%3D' (2024-09-11)
• 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/7570de7b9b504cfe92025dd1be797bf546f66528?narHash=sha256-tyMUA6NgJSvvQuzB7A1Sf8%2B0XCHyfSPRx/b00o6K0uo%3D' (2024-09-05)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/6e75319846684326d900daff1e2e11338cc80d2b?narHash=sha256-WzeUR1MG9MnJnh9T7qcVe/v12qHvJvzdc3Z5HCeE2ns%3D' (2024-08-15)
  → 'github:oxalica/rust-overlay/e9f8641c92f26fd1e076e705edb12147c384171d?narHash=sha256-YfLRPlFZWrT2oRLNAoqf7G3%2BNnUTDdlIJk6tmBU7kXM%3D' (2024-09-14)