Update flake.lock (#11410)

flake.lock: Update

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/69397a3079106e7b40ee892f9a96ffac1abb08ff?narHash=sha256-rSJDBT%2B4DFEieHY4ljTzUmAjYcdSNAvonxYoW4eN9sY%3D' (2025-08-16)
  → 'github:nix-community/fenix/6ed03ef4c8ec36d193c18e06b9ecddde78fb7e42?narHash=sha256-tl/0cnsqB/Yt7DbaGMel2RLa7QG5elA8lkaOXli6VdY%3D' (2025-08-19)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/b2a58b8c6eff3c3a2c8b5c70dbf69ead78284194?narHash=sha256-TbhPR5Fqw5LjAeI3/FOPhNNFQCF3cieKCJWWupeZmiA%3D' (2025-08-12)
  → 'github:rust-lang/rust-analyzer/a905e3b21b144d77e1b304e49f3264f6f8d4db75?narHash=sha256-VX0B9hwhJypCGqncVVLC%2BSmeMVd/GAYbJZ0MiiUn2Pk%3D' (2025-08-18)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/32f313e49e42f715491e1ea7b306a87c16fe0388?narHash=sha256-nNaeJjo861wFR0tjHDyCnHs1rbRtrMgxAKMoig9Sj/w%3D' (2025-08-15)
  → 'github:NixOS/nixpkgs/f937f8ecd1c70efd7e9f90ba13dfb400cf559de4?narHash=sha256-4/Jd%2BLkQ2ssw8luQVkqVs9spDBVE6h/u/hC/tzngsPo%3D' (2025-08-22)

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

Author: github-actions[bot]