[AppGW] Fixing help file

Author: kagamsft

src/ResourceManager/Network/Commands.Network/Microsoft.Azure.Commands.Network.dll-Help.xml

@@ -44069,7 +44069,7 @@ PS C:\> $Cert = Set-AzureRmApplicationGatewaySslCertificate –ApplicationGat
 		<maml:copyright>
 			<maml:para />
 		</maml:copyright>
-		<command:verb>Set</command:verb>
+		<command:verb>Remove</command:verb>
 		<command:noun>AzureRmApplicationGatewaySslPolicy</command:noun>
 		<dev:version />
 	</command:details>