flake.lock: Update (#612)

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/e9ee548d90ff586a6471b4ae80ae9cfcbceb3420?narHash=sha256-4Zu0RYRcAY/VWuu6awwq4opuiD//ahpc2aFHg2CWqFY%3D' (2024-06-13)
  → 'github:nixos/nixpkgs/c3aa7b8938b17aebd2deecf7be0636000d62a2b9?narHash=sha256-med8%2B5DSWa2UnOqtdICndjDAEjxr5D7zaIiK4pn0Q7c%3D' (2024-08-14)
• Updated input 'pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/cc4d466cb1254af050ff7bdf47f6d404a7c646d1?narHash=sha256-7XfBuLULizXjXfBYy/VV%2BSpYMHreNRHk9nKMsm1bgb4%3D' (2024-06-06)
  → 'github:cachix/pre-commit-hooks.nix/c7012d0c18567c889b948781bc74a501e92275d1?narHash=sha256-qbhjc/NEGaDbyy0ucycubq4N3//gDFFH3DOmp1D3u1Q%3D' (2024-08-09)
• Updated input 'pre-commit-hooks/nixpkgs-stable':
    'github:NixOS/nixpkgs/614b4613980a522ba49f0d194531beddbb7220d3?narHash=sha256-3Eh7fhEID17pv9ZxrPwCLfqXnYP006RKzSs0JptsN84%3D' (2024-03-17)
  → 'github:NixOS/nixpkgs/194846768975b7ad2c4988bdb82572c00222c0d7?narHash=sha256-NGKVY4PjzwAa4upkGtAMz1npHGoRzWotlSnVlqI40mo%3D' (2024-07-07)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/7c2d603cb67c974ef8c5cfee1150060dbb299e04?narHash=sha256-s8QrTANEtY6UxzfkcBfoN93bgW9aCRIq54LPRVNu/4c%3D' (2024-06-15)
  → 'github:oxalica/rust-overlay/6e75319846684326d900daff1e2e11338cc80d2b?narHash=sha256-WzeUR1MG9MnJnh9T7qcVe/v12qHvJvzdc3Z5HCeE2ns%3D' (2024-08-15)
• Removed input 'rust-overlay/flake-utils'
• Removed input 'rust-overlay/flake-utils/systems'
• Updated input 'rust-overlay/nixpkgs':
    'github:NixOS/nixpkgs/90f456026d284c22b3e3497be980b2e47d0b28ac?narHash=sha256-LE8lVX28MV2jWJsidW13D2qrHU/RUUONendL2Q/WlJg%3D' (2024-01-29)
  → 'github:NixOS/nixpkgs/e6cea36f83499eb4e9cd184c8a8e823296b50ad5?narHash=sha256-WdWDpNaq6u1IPtxtYHHWpl5BmabtpmLnMAx0RdJ/vo8%3D' (2024-06-15)

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