Is your feature request related to a problem? Please describe.
I found out recently when trying to do a course on the app after having done the previous course on pc. That the default “ on ios at least, doesn't work in html code. It will simply say you are missing a whole attribute and not that your quote marks should be " instead. I had everything correct except the pesky “.

Describe the solution you'd like
Id suggest changing or adding feedback in the app, for the user to check if the correct " is used.

Describe alternatives you've considered
Its also possible that the app could simply auto add "" when pressing “ but i imagine this is more complex than simply adding text feedback.

Additional context
Here is the forum post i made to clarify what was going on https://forum.freecodecamp.org/t/learn-basic-css-by-building-a-cafe-menu-step-1/683137?u=pandoragoat

Here is a screenshot of what the current feedback looks like.