flake.lock: Update

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/0371cb3179c16f4f932557f855082bf57d371166?narHash=sha256-WXSXGpOsFpIWmo92adRpKrC2PecFc12rkba6RBNXtfA%3D' (2024-05-04)
  → 'github:nix-community/fenix/297c756ba6249d483c1dafe42378560458842173?narHash=sha256-ezoe/FwfJpA7sskLoLP2iwfwkYnscEFCP6Vk5kPwh9k%3D' (2024-05-10)
• Updated input 'fenix/nixpkgs':
    'github:nixos/nixpkgs/63c3a29ca82437c87573e4c6919b09a24ea61b0f?narHash=sha256-4cPymbty65RvF1DWQfc%2BBc8B233A1BWxJnNULJKQ1EY%3D' (2024-05-02)
  → 'github:nixos/nixpkgs/b211b392b8486ee79df6cdfb1157ad2133427a29?narHash=sha256-CLU5Tsg24Ke4%2B7sH8azHWXKd0CFd4mhLWfhYgUiDBpQ%3D' (2024-05-07)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/1a5bb27c018c947dab01ab70ffe1d267b0481a17?narHash=sha256-5PuPbEIUfXrW3u3wZqct22hcoc3K6XOhV3iEIp/wZTg%3D' (2024-05-03)
  → 'github:rust-lang/rust-analyzer/5bf2f85c8054d80424899fa581db1b192230efb5?narHash=sha256-vLLgYpdtKBaGYTamNLg1rbRo1bPXp4Jgded/gnprPVw%3D' (2024-05-09)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/b980b91038fc4b09067ef97bbe5ad07eecca1e76?narHash=sha256-tCxeDP4C1pWe2rYY3IIhdA40Ujz32Ufd4tcrHPSKx2M%3D' (2024-05-04)
  → 'github:NixOS/nixpkgs/8e47858badee5594292921c2668c11004c3b0142?narHash=sha256-q0OFeZqKQaik2U8wwGDsELEkgoZMK7gvfF6tTXkpsqE%3D' (2024-05-11)
• Updated input 'nixpkgs-master':
    'github:NixOS/nixpkgs/d35995a8d7daab63238e6fed3279eca869955aca?narHash=sha256-hEJgDZC6wJFIuB5e56BX6Ae75u0mREF4hY7dp3fmX00%3D' (2024-05-05)
  → 'github:NixOS/nixpkgs/43cf50bd159b0c356e993121a38a5a9e4946a9a0?narHash=sha256-cqDwi2gubg0lSs93FJN25FxY6k5K78JaAj4ULCXd8uw%3D' (2024-05-12)