fix lint error with custom CSS class

Relates to #2261 - this makes the linter pass all the checks. The issue is that "nextra" is some kind of indirect dependency for the website but two components are using nextra-scrollbar CSS class.

I fixed this by adding this class to whitelist of the tailwindcss/no-custom-classname eslint rule.

Description

I wanted to contribute to the project but was bothered that basic checks do not work. I decided to do this quick fix.

Fixes #2299

Type of change

Please delete options that are not relevant.

[X] Bug fix (non-breaking change which fixes an issue)

Screenshots/Sandbox (if appropriate/relevant):

N/A

How Has This Been Tested?

Run pnpm lint on your local machine, all checks should pass. These checks should now also pass in CI

Test Environment:

OS: macOS Sonoma 14.3.1
@graphql-eslint/...: "4.0.0-alpha.0"
NodeJS: 18.15.0

Checklist:

[X] I have followed the CONTRIBUTING doc and the style guidelines of this project
[X] I have performed a self-review of my own code
[ ] I have commented my code, particularly in hard-to-understand areas
[ ] I have made corresponding changes to the documentation
[X] My changes generate no new warnings
[ ] I have added tests that prove my fix is effective or that my feature works
[X] New and existing unit tests and linter rules pass locally with my changes
[ ] Any dependent changes have been merged and published in downstream modules

Further comments

Maybe the lint rule is correct and we shouldn't use the custom class name. But depending on nextra seems indirect, searching for it only yields results in pnpm-lock.yaml. So to me, it even seems very suspicious, perhaps we could delete it?

dimaMachina / graphql-eslint