rubyのバージョンを3.1.1にしてもう一回インストールしなおしてinitしようとするとこうなりました
narou init
/Users/username/.rbenv/versions/3.1.1/lib/ruby/gems/3.1.0/gems/narou-3.8.1/lib/inventory.rb:45:in `merge!': no implicit conversion of false into Hash (TypeError)
from /Users/username/.rbenv/versions/3.1.1/lib/ruby/gems/3.1.0/gems/narou-3.8.1/lib/inventory.rb:45:in `init'
from /Users/username/.rbenv/versions/3.1.1/lib/ruby/gems/3.1.0/gems/narou-3.8.1/lib/inventory.rb:23:in `block in load'
from <internal:kernel>:90:in `tap'
from /Users/username/.rbenv/versions/3.1.1/lib/ruby/gems/3.1.0/gems/narou-3.8.1/lib/inventory.rb:21:in `load'
from /Users/username/.rbenv/versions/3.1.1/lib/ruby/gems/3.1.0/gems/narou-3.8.1/narou.rb:38:in `<top (required)>'
from /Users/username/.rbenv/versions/3.1.1/lib/ruby/gems/3.1.0/gems/narou-3.8.1/bin/narou:13:in `require_relative'
from /Users/username/.rbenv/versions/3.1.1/lib/ruby/gems/3.1.0/gems/narou-3.8.1/bin/narou:13:in `<top (required)>'
from /Users/username/.rbenv/versions/3.1.1/bin/narou:25:in `load'
from /Users/username/.rbenv/versions/3.1.1/bin/narou:25:in `<main>'
パソコン割と初心者なんでわけわかめですたすけてください