Use Builder Sans instead of Gotham

[ryanlua]

Is your feature request related to a problem?

Roblox has announced they were deprecating Gotham and replacing it with Montserrat.

Describe the solution you'd like

Satchel to use Builder Sans instead of Gotham which Roblox no longer uses or has.

Describe alternatives you've considered

Changing the font manually to Builder Sans.

Additional context

https://devforum.roblox.com/t/2868222

Code of Conduct

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