Update flake.lock (#11568)

flake.lock: Update

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/9f42df6d931262bc814ef681bcac6de779bebaeb?narHash=sha256-1Eb53rxrULE1%2BMTHhxJTPNMwKKD6bkROd98L8LgMtCM%3D' (2025-08-30)
  → 'github:nix-community/fenix/22cabbc275cf8b258ec6e2be58553853e2ee005d?narHash=sha256-etrTo3sL%2BaHWeG9ct9NGJpgW4qv84ajwQRKv4gGmkao%3D' (2025-09-06)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/67a58fdfebd72f4f9f737f2715ab21a260d88383?narHash=sha256-5U2p%2BgLtH17qtAZY1bdY0snoN/gRlQ8nH3LO%2BYw3hCk%3D' (2025-08-29)
  → 'github:rust-lang/rust-analyzer/a53b44412d4643cdec41005129735b38737eb296?narHash=sha256-JMLa0ZsbEd3%2B3E0/PQj/igVi9%2Bpb98TgxaOEEw%2Bt1bo%3D' (2025-09-05)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/a918bb3594dd243c2f8534b3be01b3cb4ed35fd1?narHash=sha256-ynQxPVN2FIPheUgTFhv01gYLbaiSOS7NgWJPm9LF9D0%3D' (2025-08-30)
  → 'github:NixOS/nixpkgs/c6a788f552b7b7af703b1a29802a7233c0067908?narHash=sha256-6n/n1GZQ/vi%2BLhFXMSyoseKdNfc2QQaSBXJdgamrbkE%3D' (2025-09-03)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]