Update CHANGELOG.md

CHANGELOG.md

@@ -11,9 +11,14 @@
 
 ## New Features
 * **Data Source Proxy**: Add support for whitelisting specified cookies that will be passed through to the data source when proxying data source requests [#5457](https://github.com/grafana/grafana/issues/5457), thanks [@robingustafsson](https://github.com/robingustafsson)
+
 ## Fixes 
 * **Sensu**: Send alert message to sensu output [#9551](https://github.com/grafana/grafana/issues/9551), thx [@cjchand](https://github.com/cjchand)
 
+# 4.6.0-beta3 (unreleased)
+* **Prometheus**: Fix for browser crash for short time ranges. [#9575](https://github.com/grafana/grafana/issues/9575)
+* **Heatmap**: Fix for y-axis not showing. [#9576](https://github.com/grafana/grafana/issues/9576)
+
 # 4.6.0-beta2 (2017-10-17)
 
 ## Fixes