flake.lock: Update

Flake lock file updates:

• Updated input 'git-hooks':
    'github:cachix/git-hooks.nix/16ec914f6fb6f599ce988427d9d94efddf25fe6d' (2025-06-24)
  → 'github:cachix/git-hooks.nix/54df955a695a84cd47d4a43e08e1feaf90b1fd9b' (2025-09-17)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/94def634a20494ee057c76998843c015909d6311' (2025-07-31)
  → 'github:NixOS/nixpkgs/e9f00bd893984bc8ce46c895c3bf7cac95331127' (2025-09-28)
• Updated input 'nixpkgs-25_05':
    'github:NixOS/nixpkgs/1f08a4df998e21f4e8be8fb6fbf61d11a1a5076a' (2025-07-29)
  → 'github:NixOS/nixpkgs/5ed4e25ab58fd4c028b59d5611e14ea64de51d23' (2025-09-29)