docs: unqualify mobx version for react usage (#1380)
docs: unqualify mobx version for react usage (#1380)

Per https://github.com/Redocly/redoc/issues/1189#issuecomment-606857342 the latest version works now, and the currently-specified version doesn't.
Rebilly/ReDoc,Rebilly/ReDoc,Rebilly/ReDoc,Rebilly/ReDoc