Update template-metadata.json
Update template-metadata.json

More templates use Twilio
- I've removed "Arrange welcome drinks for an Eventbrite event"

- Need to update the following to use something instead of Twilio "Welcome guide part 2 - Announce new Eventbrite attendee on Slack and send voucher"  I'm investigating alternative connectors, but think we'll need a different use case.   Work being done for https://github.ibm.com/Cloud-Integration/appconnect-ruby/issues/735
ot4i/app-connect-templates