Update Changelog.md

Changelog.md

@@ -2,6 +2,11 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.45] - 2020-06-05
+- DBOARD3-242: use cached netconf/snmp data when router is unavailable
+- use celery events rather than status for logging errors & warnings
+- added a monitoring process and api for exposing event messages
+
 ## [0.44] - 2020-06-03
 - DBOARD3-284: accomodate IMS API updates
 - DBOARD3-271: added customer-user weeding