flake.lock: Update

Flake lock file updates:

• Updated input 'emacs-overlay':
    'github:nix-community/emacs-overlay/eaf998b4ab1397000afeeced036fcb55e61750dd' (2024-01-19)
  → 'github:nix-community/emacs-overlay/7ead5922cd7e28b488040ae600ab079578220b3e' (2024-01-22)
• Updated input 'emacs-overlay/nixpkgs':
    'github:NixOS/nixpkgs/842d9d80cfd4560648c785f8a4e6f3b096790e19' (2024-01-17)
  → 'github:NixOS/nixpkgs/bbe7d8f876fbbe7c959c90ba2ae2852220573261' (2024-01-19)
• Updated input 'emacs-overlay/nixpkgs-stable':
    'github:NixOS/nixpkgs/8bf65f17d8070a0a490daf5f1c784b87ee73982c' (2024-01-17)
  → 'github:NixOS/nixpkgs/1b64fc1287991a9cce717a01c1973ef86cb1af0b' (2024-01-20)
• Updated input 'home-manager':
    'github:nix-community/home-manager/b84191db127c16a92cbdf7f7b9969d58bb456699' (2024-01-17)
  → 'github:nix-community/home-manager/2d47379ad591bcb14ca95a90b6964b8305f6c913' (2024-01-21)
• Updated input 'neovim-nightly-overlay':
    'github:nix-community/neovim-nightly-overlay/e53738305c3ee233abd025cc4947a282eeb2e8c0' (2024-01-19)
  → 'github:nix-community/neovim-nightly-overlay/45e929aad54296c766685b8eb0ebfc051b49acc3' (2024-01-22)
• Updated input 'neovim-nightly-overlay/neovim-flake':
    'github:neovim/neovim/78b000c74d631fb097bc2ada0c929153f96d9769?dir=contrib' (2024-01-18)
  → 'github:neovim/neovim/4d4092ac9e98f04ae949c605aa6e2b55ca605a1f?dir=contrib' (2024-01-21)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/842d9d80cfd4560648c785f8a4e6f3b096790e19' (2024-01-17)
  → 'github:NixOS/nixpkgs/bbe7d8f876fbbe7c959c90ba2ae2852220573261' (2024-01-19)