flake.lock: Update

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/b435bfccee71c6591dbce2fcfabe3e17e98c09fa?narHash=sha256-yH1K/WDJpwIIw7e3wKdRgwHAZ38LXgcGE2Ecvk3I6GU%3D' (2025-10-19)
  → 'github:nix-community/fenix/3107255abfe4f2d1c3eee7a3e2f5a5eb6f2200fe?narHash=sha256-isqMvjTk3jdTHN6KA/BWQvOSVe7O35OQKAZNtLK76OY%3D' (2025-11-01)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/1e20331e42449dfc0b44bce84147a06772d045d7?narHash=sha256-WOt9KquZ1BXjMcVyHpMeliqNRL6BfRvBHFGfRDriDx4%3D' (2025-10-17)
  → 'github:rust-lang/rust-analyzer/2e2e3ebec91215078de9b754363fc9a7b0fdef13?narHash=sha256-SreGV62DEv7kLJEcOBrw2V6Kup0siT4wS3Ye8PlFTdE%3D' (2025-10-31)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/63bdb5d90fa2fa11c42f9716ad1e23565613b07c?narHash=sha256-c5C907Raf9eY8f1NUXYeju9aUDlm227s/V0OptEbypA%3D' (2025-10-19)
  → 'github:NixOS/nixpkgs/a7fc11be66bdfb5cdde611ee5ce381c183da8386?narHash=sha256-QoJjGd4NstnyOG4mm4KXF%2BweBzA2AH/7gn1Pmpfcb0A%3D' (2025-10-31)

Author: github-actions[bot]