Update src/aks-preview/HISTORY.rst

Co-authored-by: Xing Zhou <Zhou.Xing@microsoft.com>

Author: anushkasingh16

src/aks-preview/HISTORY.rst

@@ -15,7 +15,7 @@ Pending
 
 18.0.0b19
 +++++++
-- Added  `--localdns-config` to `az aks nodepool add`` and  to `az aks nodepool update` to support configuring a local DNS profile for agentpools.
+- Add  `--localdns-config` to `az aks nodepool add`` and  to `az aks nodepool update` to support configuring a local DNS profile for agentpools.
 
 
 18.0.0b18