Update examples/reactnative/rn063example/README.md
Update examples/reactnative/rn063example/README.md

Co-authored-by: Tom Longridge <96835dd8bfa718bd6447ccc87af89ae1675daeca@bugsnag.com>
bugsnag/bugsnag-js,bugsnag/bugsnag-js,bugsnag/bugsnag-js,bugsnag/bugsnag-js,bugsnag/bugsnag-js,bugsnag/bugsnag-js,bugsnag/bugsnag-js,bugsnag/bugsnag-js,bugsnag/bugsnag-js,bugsnag/bugsnag-js,bugsnag/bugsnag-js