Replace 'https' with 'http' in the name of the event notification contract for code samples to compile correctly. (#35677)

* Learn Editor: Update create-event-notification-transact-sql.md

Learn Editor: Update create-event-notification-transact-sql.md

* Edit pass

---------

Co-authored-by: Randolph West MSFT <97149825+rwestMSFT@users.noreply.github.com>

Author: sergten