flake.lock: Update

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/1458349a1bd55105f917e962dca4b328ac0a55e8?narHash=sha256-P9VX/P2mN96MkFN8hwCYUQ%2BLV1bfH57UJ/pGwjd0Olc%3D' (2025-09-13)
  → 'github:nix-community/fenix/3107255abfe4f2d1c3eee7a3e2f5a5eb6f2200fe?narHash=sha256-isqMvjTk3jdTHN6KA/BWQvOSVe7O35OQKAZNtLK76OY%3D' (2025-11-01)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/9edc9cbe5d8e832b5864e09854fa94861697d2fd?narHash=sha256-/PAhxheUq4WBrW5i/JHzcCqK5fGWwLKdH6/Lu1tyS18%3D' (2025-09-08)
  → 'github:rust-lang/rust-analyzer/2e2e3ebec91215078de9b754363fc9a7b0fdef13?narHash=sha256-SreGV62DEv7kLJEcOBrw2V6Kup0siT4wS3Ye8PlFTdE%3D' (2025-10-31)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/6d7ec06d6868ac6d94c371458fc2391ded9ff13d?narHash=sha256-fEvTiU4s9lWgW7mYEU/1QUPirgkn%2BodUBTaindgiziY%3D' (2025-09-13)
  → 'github:NixOS/nixpkgs/a7fc11be66bdfb5cdde611ee5ce381c183da8386?narHash=sha256-QoJjGd4NstnyOG4mm4KXF%2BweBzA2AH/7gn1Pmpfcb0A%3D' (2025-10-31)

Author: github-actions[bot]