flake.lock: Update

Flake lock file updates:

• Updated input 'nightly-overlay':
    'github:nix-community/neovim-nightly-overlay/fd381a5a19f553c2466dc437fb94fcf799d77e82?narHash=sha256-ibHgAkr8OXAP8MRBo4Z7AIaVdOHywGR2J8R50vZCQjI%3D' (2024-12-30)
  → 'github:nix-community/neovim-nightly-overlay/bcd445a62280469b07354f1263bc1f136e64506a?narHash=sha256-n7c2VcDQN2C6vUV8/AfaZpHYWgvlbFcHErqf//hPwC8%3D' (2024-12-31)
• Updated input 'nightly-overlay/neovim-src':
    'github:neovim/neovim/e4bc8b5967d22840c1e52c97acab0f77107cd48c?narHash=sha256-PMeWazyxGxpA6UeVrWH/ur8WuqliGxXlRjTTQdMiYVc%3D' (2024-12-29)
  → 'github:neovim/neovim/e9c077d197a80a2ecd858821b18d0be3e3eb6d0b?narHash=sha256-T/UtvF0WSkXy4Lk0ZzCsqjp6At0SRmwTsRXDxJcFzMA%3D' (2024-12-30)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/6d97d419e5a9b36e6293887a89a078cf85f5a61b?narHash=sha256-opBsbR/nrGxiiF6XzlVluiHYb6yN/hEwv%2BlBWTy9xoM%3D' (2024-12-30)
  → 'github:NixOS/nixpkgs/0e82ab234249d8eee3e8c91437802b32c74bb3fd?narHash=sha256-zExSA1i/b%2B1NMRhGGLtNfFGXgLtgo%2BdcuzHzaWA6w3Q%3D' (2024-12-30)