flake.lock: Update (#489)

Flake lock file updates:

• Updated input 'neovim-nightly':
    'github:nix-community/neovim-nightly-overlay/77482d0efef2807924c593947bdf16e303e79f42?narHash=sha256-1QL3KSEjc99%2BISyzBHHaLGjRrPkLfsFiHZBc40kAiQ8%3D' (2025-02-10)
  → 'github:nix-community/neovim-nightly-overlay/705e07d87df327c6e74add1be99c65cfee21cacf?narHash=sha256-BB67RIHP2SYVocjoFaJ6OUmHItF42sNcLO/330DHWn8%3D' (2025-02-11)
• Updated input 'neovim-nightly/neovim-src':
    'github:neovim/neovim/59a171fd99a7452c8840eee55783fb6746994637?narHash=sha256-lq/xXRuVSf2ohTRCEgstJJGQX50S5C12WbYL5qj3MBU%3D' (2025-02-09)
  → 'github:neovim/neovim/c7d13f2895fa657ff3d9d45741f9abec25072b56?narHash=sha256-nxQ0sMFIqSTuD8C%2BAsS6DcMYQbmi4ZWmkGyrqJh/D1Y%3D' (2025-02-10)

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

Author: mrcjkb