Remove escape character in face description of $.$

[paidlowered]

Changes

Please test this in the testing server before pushing it to production. I don't know how to set up an environment similar to the ROBLOX creator documentation. Basically a shot in the dark. The same thing happens with :3 btw
I removed the backslashes from the $ in the name for $.$. Also, these dollar signs are not appearing because the website is failing to render... LaTeX?? This is a wiki, not a math paper

Please do realize this PR is in good faith

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[github-actions]

Hi @paidlowered, thanks so much for helping improve the Roblox creator documentation! Our technical writing team will review your pull request soon. In the meantime, please ensure you've read through the README.md, contribution guidelines, and style recommendations.

[aetter]

Hey @paidlowered, it's possible you caught this in between builds to the website or something, but I'm not seeing any rendering issues at the moment. We do support and occasionally use typeset math, so the consequence is that we have to escape dollar signs in certain situations.