flake.lock: Update

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/f1cf6dcfc51a08e154ec753f11146dc1d95be1e5?narHash=sha256-EIP2/UXzbkb1ZWoa0pTwNv2ZivlfbRT%2B7j0fj36IhWg%3D' (2026-01-25)
  → 'github:nix-community/fenix/3c09e6c592c6ebfb9cde94bba990af23b2c06a87?narHash=sha256-AIbVmDAJFVRl%2BPUkgoOHVvzulVLQW0pcltKNrBVWxww%3D' (2026-05-17)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/cc76a8a0c6039abb17e005aa5f96c9d13d4d9665?narHash=sha256-LoyIkk68hFEwE49o8rzYK50bqX8jWhjcxpYLz2lBCbI%3D' (2026-01-24)
  → 'github:rust-lang/rust-analyzer/ace47025ddfc7fec399e11594318e64443c0e1c2?narHash=sha256-bNCTsqjqpSVXDKsCKHTyNEaw6LpaiRUoUVKlVDSzjHk%3D' (2026-05-16)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/48698d12cc10555a4f3e3222d9c669b884a49dfe?narHash=sha256-yxgb4AmkVHY5OOBrC79Vv6EVd4QZEotqv%2B6jcvA212M%3D' (2026-01-25)
  → 'github:NixOS/nixpkgs/d233902339c02a9c334e7e593de68855ad26c4cb?narHash=sha256-30sZNZoA1cqF5JNO9fVX%2BwgiQYjB7HJqqJ4ztCDeBZE%3D' (2026-05-15)

Author: sunng87