updated the changelog

Author: darshanhs90

src/ResourceManager/Resources/ChangeLog.md

@@ -18,7 +18,9 @@
         - Additional information about change #1
 -->
 ## Current Release
-
+* Fixed issue where Get-AzureRMRoleAssignment would result in a Bad Request if the number of roleassignments where greater than 1000
+    - Users can now use Get-AzureRMRoleAssignment even if the roleassignments to be returned is greater than 1000
+    
 ## Version 4.0.0
 * Support cross-resource-group deployments for New-AzureRmResourceGroupDeployment
     - Users can now use nested deployments to deploy to different resource groups.