changelog: adds note about closing #9640

CHANGELOG.md

@@ -16,6 +16,11 @@
 * **Sensu**: Send alert message to sensu output [#9551](https://github.com/grafana/grafana/issues/9551), thx [@cjchand](https://github.com/cjchand)
 * **Singlestat**: suppress error when result contains no datapoints [#9636](https://github.com/grafana/grafana/issues/9636), thx [@utkarshcmu](https://github.com/utkarshcmu)
 
+# 4.6.0-beta4 (unreleased)
+
+## Fixes
+* **Alerting**: Viewer can no longer pause alert rules [#9640](https://github.com/grafana/grafana/issues/9640)
+
 # 4.6.0-beta3 (2017-10-23)
 
 ## Fixes