Add Another Restaurant Attribute with a GeoJSON Property and Display it in a Leaflet Popup

When looking for restaurants, people like to know if the restaurant serves food to their dietary needs. Maybe they're vegan or lactose intolerant -- either way, we can add another data attribute that allows us to display that information.

Create a new data attribute in our the properties of each location in our GeoJSON file for another category like Dietary Restrictions and set up our popup to include that information!

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