flake.lock: Update

Flake lock file updates:

• Updated input 'neovim-nightly':
    'github:nix-community/neovim-nightly-overlay/7d9aaf2f175602b8511e4c5134c4a975628c6948?narHash=sha256-s5%2Btrj2UfrIWlrCm%2BhKDB5%2B36kY5scH9MxM9zfU%2B4qc%3D' (2025-01-23)
  → 'github:nix-community/neovim-nightly-overlay/8a11d160b76ea8dc76ac3356140010e38fef0ab5?narHash=sha256-fohNScp0mg8eUugIoqcLhy7tnUJ7CxhcVomizNqj5b8%3D' (2025-01-25)
• Updated input 'neovim-nightly/neovim-src':
    'github:neovim/neovim/af0ef2ac9dd19b7c4005a3197334d3e7d554646c?narHash=sha256-bW3ub7hI5Ml%2B4cFErZvlbbQNDmmycoroRYYAegj33qo%3D' (2025-01-22)
  → 'github:neovim/neovim/c6d2cbf8f51abfa0c9d244ef384a15b0b69e16c6?narHash=sha256-7bgefXUOc5AVXSZ4E%2B0YzJKW4c%2BtDj1ttmDoZN1BhPs%3D' (2025-01-24)
• Updated input 'neovim-nightly/nixpkgs':
    'github:NixOS/nixpkgs/5757bbb8bd7c0630a0cc4bb19c47e588db30b97c?narHash=sha256-3wFonKmNRWKq1himW9N3TllbeGIHFACI5vmLpk6moF8%3D' (2025-01-22)
  → 'github:NixOS/nixpkgs/ecd26a469ac56357fd333946a99086e992452b6a?narHash=sha256-ET91TMkab3PmOZnqiJQYOtSGvSTvGeHoegAv4zcTefM%3D' (2025-01-24)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/606996d74f6e2a12635d41c1bf58bfc7ea3bb5ec?narHash=sha256-BaMuhctP1x00%2B8cBE2cJveJQb70/tWHI50MHj/ZrtOY%3D' (2025-01-22)
  → 'github:nixos/nixpkgs/ecd26a469ac56357fd333946a99086e992452b6a?narHash=sha256-ET91TMkab3PmOZnqiJQYOtSGvSTvGeHoegAv4zcTefM%3D' (2025-01-24)