fix: command and args typo in website/docs

[yaegassy]

Description

I found a command and args typo in the documentation and fixed it. 😇

• https://www.curlylint.org/docs/command-line-usage#--config

Misc

On a different note, I made a plugin(extension) that allows curlylint to work with my Vim(coc.nvim). 🙇

• https://github.com/yaegassy/coc-curlylint