Add CSS Question on font faces

[khairalanam]

Summary of changes

This PR adds a question to the CSS quiz on font faces.

Checklist

• [x] I have read and followed the contribution guidelines.
• [x] I have read through the Code of Conduct and agree to abide by the rules.
• [x] This PR is for one of the available issues and is not a PR for an issue already assigned to someone else.
• [x] My PR title has a short descriptive name so the maintainers can get an idea of what the PR is about.
• [x] I have provided a summary of my changes.

[jdwilkin4]

Also as a sidenote, it is best in open source to create branches when submitting pull requests instead of trying to do everything from main.

It will help you avoid stuff like this

Here is an article going more in depth https://blog.jasonmeridth.com/posts/do-not-issue-pull-requests-from-your-master-branch/

Something to keep in mind about using branches for future PR's https://www.freecodecamp.org/news/how-to-create-a-local-git-branch/

[khairalanam]

Thanks for the sidenote! I will be wary of it the next time I send a PR.

[khairalanam]

I have implemented the changes. I will send the future PRs from a different branch.

[khairalanam]

Thank you so much!