Updates JS SDK locations.
Updates JS SDK locations.

One of the files was using stage.twiliocdn.com which wasn't loading.
Updated to the script tags documented here: https://www.twilio.com/docs/api/chat/sdks.

twilio/ip-demo-js,1234abhishekjoshi/twilio-chatapp,solastley/chime-hacks,twilio/ip-messaging-demo-js,twilio/ip-messaging-demo-js,1234abhishekjoshi/twilio-chatapp,solastley/chime-hacks,twilio/ip-demo-js