Error: Chapter Name is causing error in file naming due to usage of restricted symbols

[foxtbirdy]

This will create an issue where the chapter names may create an error if the --out argument is used.
This is what happened in downloading dungeons and artifacts
The chapter name is What's a Goblin's Favorite Type of Fish?

Originally posted by @Code-Blender-7 in #3 (comment)

[foxtbirdy]

The folder naming is a useful tool. I recommend replacing string characters with whitespace to solve this issue and maintain the functionality with minor limitations.

[ZilverSick]

#57

[stemalomd]

The issue is located in the chapter_directory variable on line 78 of webtoon_downloader\core\webtoon\downloaders\chapter.py. We need to replace any illegal characters in the chapter_directory, which represents the chapter directory name.