Fixed minor typo in Sass documentation

[marios-zindilis]

Description

In the Customize → Sass documentation, there is this phrase:

[...] or with a GUI applications

That looks like a typo. Either "applications" should be "application", or "a" should be removed. I went with the first option.

Motivation & Context

Spelling.

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

None

Related issues

None

[julien-deramond]

Thanks for your contribution, good catch! Changed it to the plural form for more flexibility.