flake.lock: Update

Flake lock file updates:

• Updated input 'nightly':
    'github:nix-community/neovim-nightly-overlay/6a21da1b53a9a5c6467694b9456b4447cbd69816?narHash=sha256-PApi0lMoKu8Ragc1pyrcgFyye1Xhfh4qsL%2BtMyvnYjw%3D' (2024-09-27)
  → 'github:nix-community/neovim-nightly-overlay/b0e07ef4637357f272a62e6bb7f5f4460766aade?narHash=sha256-fzvvCB0hjPPq3BhawZxcHAxY%2BMQIgJp6fJoa7QN/Sfc%3D' (2024-09-28)
• Updated input 'nightly/neovim-src':
    'github:neovim/neovim/a9287dd882e082a17fc7dcf004d3f991ed29001b?narHash=sha256-vhOhvCtNWeuqtjMnV87Xb2zgFDJJUrWcAofzQNYyiR8%3D' (2024-09-26)
  → 'github:neovim/neovim/0f067cd34d09b38f9aaf2e1732d825e89b573077?narHash=sha256-vwwFI1qM0vIBy4H3XrelrUk886%2BH0sJfWzEREmg2Hb8%3D' (2024-09-27)
• Updated input 'nightly/nixpkgs':
    'github:NixOS/nixpkgs/fe866c653c24adf1520628236d4e70bbb2fdd949?narHash=sha256-C3SRU3GMDNII9l16o4%2BnkybuxaDX4x5TBypwmmUBCo0%3D' (2024-09-25)
  → 'github:NixOS/nixpkgs/28b5b8af91ffd2623e995e20aee56510db49001a?narHash=sha256-1uw3y94dA4l22LkqHRIsb7qr3rV5XdxQFqctINfx8Cc%3D' (2024-09-26)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/28b5b8af91ffd2623e995e20aee56510db49001a?narHash=sha256-1uw3y94dA4l22LkqHRIsb7qr3rV5XdxQFqctINfx8Cc%3D' (2024-09-26)
  → 'github:nixos/nixpkgs/b5b2fecd0cadd82ef107c9583018f381ae70f222?narHash=sha256-k6YxGj08voz9NvuKExojiGXAVd69M8COtqWSKr6sQS4%3D' (2024-09-28)