flake.inputs: automatic update

Flake lock file updates:

• Updated input 'dmenu':
    'github:Gerschtli/dmenu/e8899e598170473427d6afa3fd595f5b944a1412' (2023-09-17)
  → 'github:Gerschtli/dmenu/15f579f7789089bbfb0647267d391e5211f72895' (2023-09-25)
• Updated input 'dwm':
    'github:Gerschtli/dwm/d05e16799d2492d65ab61ed3f83a49f1dce3e3bb' (2023-09-17)
  → 'github:Gerschtli/dwm/5afd19279d9ade2332c7a7e97ca9e89460f080d1' (2023-09-25)
• Updated input 'nix-index-database':
    'github:Mic92/nix-index-database/25d6369c232bbea1ec1f90226fd17982e7a0a647' (2023-09-24)
  → 'github:Mic92/nix-index-database/031d4b22505fdea47bd53bfafad517cd03c26a4f' (2023-10-01)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/715d72e967ec1dd5ecc71290ee072bcaf5181ed6' (2023-09-22)
  → 'github:NixOS/nixpkgs/32dcb45f66c0487e92db8303a798ebc548cadedc' (2023-09-30)
• Updated input 'unstable':
    'github:NixOS/nixpkgs/e12483116b3b51a185a33a272bf351e357ba9a99' (2023-09-21)
  → 'github:NixOS/nixpkgs/0396d3b0fb7f62ddc79a506ad3e6124f01d2ed0a' (2023-10-01)