flake.lock: Update

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/aaeaf4574767a0f5ed1787e990139aefcf4db103?narHash=sha256-iGb6ptUaNBOCftKnNJiWT5z1ftngfNtwqJkD8Z9Vwfw%3D' (2024-03-30)
  → 'github:nix-community/fenix/297c756ba6249d483c1dafe42378560458842173?narHash=sha256-ezoe/FwfJpA7sskLoLP2iwfwkYnscEFCP6Vk5kPwh9k%3D' (2024-05-10)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/f5a9250147f6569d8d89334dc9cca79c0322729f?narHash=sha256-dyezzeSbWMpflma%2BE9USmvSxuLgGcNGcGw3cOnX36ko%3D' (2024-03-29)
  → 'github:rust-lang/rust-analyzer/5bf2f85c8054d80424899fa581db1b192230efb5?narHash=sha256-vLLgYpdtKBaGYTamNLg1rbRo1bPXp4Jgded/gnprPVw%3D' (2024-05-09)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/d8fe5e6c92d0d190646fb9f1056741a229980089?narHash=sha256-iMUFArF0WCatKK6RzfUJknjem0H9m4KgorO/p3Dopkk%3D' (2024-03-29)
  → 'github:nixos/nixpkgs/f1010e0469db743d14519a1efd37e23f8513d714?narHash=sha256-doPgfj%2B7FFe9rfzWo1siAV2mVCasW%2BBh8I1cToAXEE4%3D' (2024-05-09)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/7cf3d11d06dcd12fb62ca2c039f3c5e25b53c5a7?narHash=sha256-I2/x/jFd7MAuIi3%2BkncIF0zJwhkFzxpi5XFdT2RLOF8%3D' (2024-03-30)
  → 'github:oxalica/rust-overlay/8eb8671512cb0c72c748058506e50c54fb5d8e2b?narHash=sha256-nSUFcUqyTQQ/aYFIB05mpCzytcKvfKMy3ZQAe0fP26A%3D' (2024-05-11)