Added mongodbupdate requirement to

changelog for v1.19.0.

Author: lmarini

CHANGELOG.md

@@ -5,9 +5,11 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## 1.19.0 - 2021-10-05
+**_Important:_** This update requires a MongoDB update schema due to the new ability of showing summary statistics at the
+space level. Make sure to start the application with -DMONGOUPDATE=1.
 
 ### Fixed
-- Adding dataset to space. Space list on dataset page would be empty. [#274](https://github.com/clowder-framework/clowder/issues/274)
+- Adding dataset to space. Space list on dataset page would be empty - fixed error when no spaces would load. [#274](https://github.com/clowder-framework/clowder/issues/274)
 - Typos "success" when returning status from API and "occurred" when logging to console.
 - If a dataset had multiple folders the layout would be wrong.