use another regex visualizer in comments

Created by: da-vaibhav

The present comment advices to use https://www.debuggex.com/ for regular expression visualization. In my opinion there should be another better visualizer. For example: https://jex.im/regulex whose output is much better if you copy and paste into it, than debuggex.

This won't actually make any difference in CRA but may save time for anyone who may visit the link mentioned above for regular expression visualization.