flake.lock: Update

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/25db7a6f4de7dea678620785e03fbc4560c00672?narHash=sha256-wC9PR%2BrPjmcpnPdOIDwyNwQiRhNsuDs3oZY3t42f4uA%3D' (2025-07-26)
  → 'github:nix-community/fenix/1458349a1bd55105f917e962dca4b328ac0a55e8?narHash=sha256-P9VX/P2mN96MkFN8hwCYUQ%2BLV1bfH57UJ/pGwjd0Olc%3D' (2025-09-13)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/51e77c9d7b9b99f7a230bf5179ef1343befd71ac?narHash=sha256-5XbVpJwiy%2Bsw1v4PXSAz4lgJnVna6xkzqyZtoHymFJA%3D' (2025-07-25)
  → 'github:rust-lang/rust-analyzer/9edc9cbe5d8e832b5864e09854fa94861697d2fd?narHash=sha256-/PAhxheUq4WBrW5i/JHzcCqK5fGWwLKdH6/Lu1tyS18%3D' (2025-09-08)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/6027c30c8e9810896b92429f0092f624f7b1aace?narHash=sha256-cnL5WWn/xkZoyH/03NNUS7QgW5vI7D1i74g48qplCvg%3D' (2025-07-25)
  → 'github:NixOS/nixpkgs/6d7ec06d6868ac6d94c371458fc2391ded9ff13d?narHash=sha256-fEvTiU4s9lWgW7mYEU/1QUPirgkn%2BodUBTaindgiziY%3D' (2025-09-13)

Author: github-actions[bot]