Add github handle to people.md

Co-authored-by: aprilmj <[email protected]>

Author: RRosio

people.md

@@ -67,7 +67,7 @@ Alphabetical by first name, names are followed by GitHub usernames and current e
 - Lahari Chowtoori [@LahariChowtoori](https://github.com/LahariChowtoori)
 - Rosio Reyes, [@RRosio](https://github.com/rrosio)
 - Matt Fisher, [@mfisher87](https://github.com/mfisher87/)
-- April Johnson, [@](https://github.com/)
+- April Johnson, [@aprilmj](https://github.com/aprilmj)
 
 ### [Jupyter Media Strategy Working Group](charters/MediaStrategyCharter.md)