raygui missing from release

[alexketchum]

I tried downloading raygui and got this error.

> c3c vendor-fetch raygui
Fetching library 'raygui'...Failed: 'Failed to retrieve 'github.com/c3lang/vendor/releases/download/latest/raygui.c3l' (Status code 404).'

I checked the latest release and saw that raygui was missing.

[lerno]

That is true. No one added it.