Add burger as hamburger keyword

[Clebal]

Currently, when you search "burger" you get nothing:

I think it makes sense to add burger as one of the hamburger keywords.

Another alternative would be to make search more flexible, but that can lead to major changes in search results.

[EtienneLem]

Thanks for the PR!

JSON files aren’t meant to be edited manually, they are generated by a script. This kind of change (keywords) would either need to be handled in this file (https://github.com/missive/emoji-mart/blob/main/packages/emoji-mart-data/build.js) or within the lib we use for keywords (https://github.com/muan/emojilib).

This however made me realize that burger should’ve already been a keyword and fixed an issue in 8977a6d. It should now match in the latest @emoji-mart/data release.