Adding information about query string params in Url

[sinbadxiii]

Hello!

We need to add information https://github.com/phalcon/cphalcon/blob/master/phalcon/Mvc/Url.zep#L179
on https://docs.phalcon.io/5.6/mvc-url/ page, because nobody knows it :)

[niden]

Resolved in #87. Thank you again @sinbadxiii