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/2579f163559b902959cc420a6d3bfbd98c46a323?narHash=sha256-yxcfwZCysR6zPaFv7is3/FWd1h0h6kXME0vueSwTBhU%3D' (2025-10-11)
• 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/b93180b4f2cb3c81ac7f17f46e3dfcb30ecc7843?narHash=sha256-XGkBjf4Dzg6tXd0KGgKzeW4oVX/iLzLhD3rQ1cATpqM%3D' (2025-10-10)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/a918bb3594dd243c2f8534b3be01b3cb4ed35fd1?narHash=sha256-ynQxPVN2FIPheUgTFhv01gYLbaiSOS7NgWJPm9LF9D0%3D' (2025-08-30)
  → 'github:NixOS/nixpkgs/870493f9a8cb0b074ae5b411b2f232015db19a65?narHash=sha256-BMsGVfKl4Q80Pr9T1AkCRljO1bpwCmY8rTBVj8XGuhA%3D' (2025-10-10)

Author: github-actions[bot]