Update ChangeLog.md (Azure#11948)

VeryEarly · web-flow · commit 90fabb22c45e · 2020-05-20T22:23:33.000+08:00
diff --git a/src/AlertsManagement/AlertsManagement/ChangeLog.md b/src/AlertsManagement/AlertsManagement/ChangeLog.md
@@ -18,6 +18,7 @@
         - Additional information about change #1
 -->
 ## Upcoming Release
+* Updated help messages and document for `Get-AzActionRule`
 
 ## Version 0.1.1
 * Update references in .psd1 to use relative path
