Update flake.lock (#11318)

flake.lock: Update

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/60e24f4371b1676d4ecf7d0e8325233acc9b40df?narHash=sha256-S3PJcarvDv54CT2JL8e3LyZZ9myBQNBkuSlazQ6qwys%3D' (2025-08-09)
  → 'github:nix-community/fenix/69397a3079106e7b40ee892f9a96ffac1abb08ff?narHash=sha256-rSJDBT%2B4DFEieHY4ljTzUmAjYcdSNAvonxYoW4eN9sY%3D' (2025-08-16)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/caef0f46fd97175e6c1894189689c098c4cb536f?narHash=sha256-rGSOEooq0u38dzvn677G14DGm3ue9UDQ9c1E4qyfcuU%3D' (2025-08-07)
  → 'github:rust-lang/rust-analyzer/b2a58b8c6eff3c3a2c8b5c70dbf69ead78284194?narHash=sha256-TbhPR5Fqw5LjAeI3/FOPhNNFQCF3cieKCJWWupeZmiA%3D' (2025-08-12)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/00b574b1ba8a352f0601c4dde4faff4b534ebb1e?narHash=sha256-WrZ280bT6NzNbBo%2BCKeJA/NW1rhvN/RUPZczqCpu2mI%3D' (2025-08-09)
  → 'github:NixOS/nixpkgs/32f313e49e42f715491e1ea7b306a87c16fe0388?narHash=sha256-nNaeJjo861wFR0tjHDyCnHs1rbRtrMgxAKMoig9Sj/w%3D' (2025-08-15)

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

Author: github-actions[bot]