flake.lock: Update (#3658)

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/0df8ceddac0e11b695fd622e18908724cc478552?narHash=sha256-0BQ6BZPaDq8rtEIdTduF2OPlQUKEkImKI8oysym9EVM%3D' (2024-08-31)
  → 'github:nix-community/fenix/05848315f6849b29bb538bf3c646a07cb1492548?narHash=sha256-rkyXU40J/D4ZJtigMRlZ%2B6uHsr60mseWkaUFeL%2B7NKk%3D' (2024-09-28)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/9fd70519507b673fae250f84b0990e7e8155ca98?narHash=sha256-h8Pn1th2bss7yXvxs1uR1kXYMTNej1L6Qy/GgsR4t3A%3D' (2024-08-30)
  → 'github:rust-lang/rust-analyzer/546339a7be357b3e95fc4b79a8816dce540d477b?narHash=sha256-jrr8r2CT9jsi6XDTTX%2BE39/CakTcQ9RYRp6rWGzLkk0%3D' (2024-09-27)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/5629520edecb69630a3f4d17d3d33fc96c13f6fe?narHash=sha256-CHgumPZaC7z%2BWYx72WgaLt2XF0yUVzJS60rO4GZ7ytY%3D' (2024-08-31)
  → 'github:NixOS/nixpkgs/b5b2fecd0cadd82ef107c9583018f381ae70f222?narHash=sha256-k6YxGj08voz9NvuKExojiGXAVd69M8COtqWSKr6sQS4%3D' (2024-09-28)
• Updated input 'utils':
    'github:numtide/flake-utils/b1d9ab70662946ef0850d488da1c9019f3a9752a?narHash=sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ%3D' (2024-03-11)
  → 'github:numtide/flake-utils/c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a?narHash=sha256-X6rJYSESBVr3hBoH0WbKE5KvhPU5bloyZ2L4K60/fPQ%3D' (2024-09-17)

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