feat(a11y): use list-style-stype instead of list-style none to avoid losing semantic role in Safari

[MaxLardenois]

Description

Replace list-style: none by list-style-type: ""

Motivation & Context

In Safari, using list-style: none will remove its semantic role of list, therefore it will not be announced by screen readers as such. One solution is to add role: list on each affected lists but that means relying on a good usage and adds unnecessary code. Another solution as explained here is to use list-style-type: "" instead, this will have the same visual effect but won't remove semantic role.

Type of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring (non-breaking change)
• Breaking change (fix or feature that would change existing functionality)

Checklist

• I have read the contributing guidelines
• My code follows the code style of the project (using npm run lint)
• My change introduces changes to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed

Live previews

• https://deploy-preview-{your_pr_number}--twbs-bootstrap.netlify.app/

Related issues

[mdo]

@patrickhlauke Would you mind taking a look?