flake.lock: Update

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/60e24f4371b1676d4ecf7d0e8325233acc9b40df?narHash=sha256-S3PJcarvDv54CT2JL8e3LyZZ9myBQNBkuSlazQ6qwys%3D' (2025-08-09)
  → 'github:nix-community/fenix/9f42df6d931262bc814ef681bcac6de779bebaeb?narHash=sha256-1Eb53rxrULE1%2BMTHhxJTPNMwKKD6bkROd98L8LgMtCM%3D' (2025-08-30)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/caef0f46fd97175e6c1894189689c098c4cb536f?narHash=sha256-rGSOEooq0u38dzvn677G14DGm3ue9UDQ9c1E4qyfcuU%3D' (2025-08-07)
  → 'github:rust-lang/rust-analyzer/67a58fdfebd72f4f9f737f2715ab21a260d88383?narHash=sha256-5U2p%2BgLtH17qtAZY1bdY0snoN/gRlQ8nH3LO%2BYw3hCk%3D' (2025-08-29)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/00b574b1ba8a352f0601c4dde4faff4b534ebb1e?narHash=sha256-WrZ280bT6NzNbBo%2BCKeJA/NW1rhvN/RUPZczqCpu2mI%3D' (2025-08-09)
  → 'github:NixOS/nixpkgs/a918bb3594dd243c2f8534b3be01b3cb4ed35fd1?narHash=sha256-ynQxPVN2FIPheUgTFhv01gYLbaiSOS7NgWJPm9LF9D0%3D' (2025-08-30)

Author: github-actions[bot]