docs: define fontFace is now face within font object

[jaliyaudagedara]

Prerequisites

• I have read and understood the [contributing guide][CONTRIBUTING.md].
• The commit message follows the [conventional commits][cc] guidelines.
• Tests for the changes have been added (for bug fixes / features).
• Docs have been added/updated (for bug fixes / features).

Description

Define fontFace is now face within font object.

https://learn.microsoft.com/en-us/windows/terminal/customize-settings/profile-appearance#font-face

[JanDeDobbeleer]

@all-contributors please add @jaliyaudagedara for doc

This is pure magic 🪄! @holopin-bot @jaliyaudagedara wizard

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[allcontributors]

@JanDeDobbeleer

I've put up a pull request to add @jaliyaudagedara! 🎉