Update styling-css.md

[Ar3Tea]

file type formatting

Description

File type formatting for better readability

Documentation

Styling css

Related Issues

[StefanNieuwenhuis]

> Note: You can use Sass/SCSS files as modules too, as mentioned in the previous recipe about CSS modules, with the difference that instead of `.css` the extensions have to be `.scss` or `.sass`

[bball07]

Thank you for your contribution!! I am going to merge this :)

[gatsbot]

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