fix pathing error

Author: carlrab

articles/traffic-manager/scripts/traffic-manager-cli-websites-high-availability.md

@@ -26,7 +26,7 @@ This script creates a resource group, two app service plans, two web apps, a tra
 
 ## Sample script
 
-[!INCLUDE [cli-launch-cloud-shell-sign-in.md](../../../../../includes/cli-launch-cloud-shell-sign-in.md)]
+[!INCLUDE [cli-launch-cloud-shell-sign-in.md](../../../includes/cli-launch-cloud-shell-sign-in.md)]
 
 ### Run the script