flake.lock: Update

Flake lock file updates:

• Updated input 'buildbot-nix':
    'github:nix-community/buildbot-nix/ccaecb0ec9ff6db341f622b0f2a54b562e0f1c73?narHash=sha256-35u%2BeOnTiK2YAMUwMcgg7wbnDKjvzMbNBJOlTcqwvG0%3D' (2025-02-09)
  → 'github:nix-community/buildbot-nix/dfa7ed3c4e3b300b6e8bd02ffda6cbc6aa2b2817?narHash=sha256-uJAPcqNplLPM0L6vzZCkghyU6vLQzZm%2BzOzDODq/pY8%3D' (2025-02-13)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/dbf733f7a95551ce0767d97dcfb02a0c524b7725?narHash=sha256-f9m6q0Z4RdVhPrGr78x%2BLFSgPkldfatdEdPh6HCN5J4%3D' (2025-02-12)
  → 'github:NixOS/nixpkgs/6f9b8ea84c04411c48ab5aab4620ab204936d9fc?narHash=sha256-qljqSeAWOFbd6HNg8Ey28RdZYdVN8bMb6HJK7uqCKZ0%3D' (2025-02-13)
• Updated input 'srvos':
    'github:nix-community/srvos/02f6ebf3421677bd8e810814ec6026631136792b?narHash=sha256-piGA3oWqqJ1O0nh7pr0h4aZRyWBc87UvjpabFZGchRI%3D' (2025-02-13)
  → 'github:nix-community/srvos/54aae80b7526d234658632d251e9bf278b58b7ef?narHash=sha256-7nTfMqYkc7WQwmB6m2zo2m2DEmNqrfyE%2BPdisr7cTTI%3D' (2025-02-13)