Update changelog.md

changelog.md

@@ -2,6 +2,9 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.5] - 2021-03-10
+- Added provisioning of aggregate dashboards with many targets
+
 ## [0.4] - 2021-03-03
 - Provisioning is now limited to a single org at once.