Resy made breaking changes to the book api

[lgrees]

Noticed this when booking today. Changed from x-www-form-urlencoded to json. Results in a 404 error from the logs. Seems like a simple fix. Will work on this when I have some time.

[kverb]

this must be A/B gated. I was able to make both paid and non-paid reservations and /book still used the form URL (this was the behavior i observed in the browser as well). Thanks for this project!