flake.lock: Update

Flake lock file updates:

• Updated input 'nightly-overlay':
    'github:nix-community/neovim-nightly-overlay/044f9a36ad620a119ebe154c26ec571a09f75039?narHash=sha256-EtSEYNx19xzuEBJsT7yXG%2BnVx11CM3rvrAQAXcvG/5Q%3D' (2024-12-13)
  → 'github:nix-community/neovim-nightly-overlay/f54ecbd4dc854d955fa3a06cecf5217130b70f61?narHash=sha256-2ICLd6Pc1ATA008wHi4k0JsV5mWM4jmEULINxdnd/%2Bc%3D' (2024-12-16)
• Updated input 'nightly-overlay/git-hooks':
    'github:cachix/git-hooks.nix/d8c02f0ffef0ef39f6063731fc539d8c71eb463a?narHash=sha256-%2BXTFXYlFJBxohhMGLDpYdEnhUNdxN8dyTA8WAd%2Blh2A%3D' (2024-12-08)
  → 'github:cachix/git-hooks.nix/aa9f40c906904ebd83da78e7f328cd8aeaeae785?narHash=sha256-NdaCraHPp8iYMWzdXAt5Nv6sA3MUzlCiGiR586TCwo0%3D' (2024-12-15)
• Updated input 'nightly-overlay/neovim-src':
    'github:neovim/neovim/17383870dd3b7f04eddd48ed929cc25c7e102277?narHash=sha256-8FO5Ca9bLEiD649b5gkQCdjpTmbPenJHpN0JBhtLpjE%3D' (2024-12-12)
  → 'github:neovim/neovim/798f9284793ad9693c68352f5d07dafb73fd281e?narHash=sha256-fRNSqRIwg/J46FA27cunOXgzBRZ7mfGDCtpdNI0MTtc%3D' (2024-12-16)