fix validation warnings

Author: halkazwini

articles/network-watcher/packet-capture-manage.md

@@ -192,6 +192,8 @@ Use [az network watcher packet-capture stop](/cli/azure/network/watcher/packet-c
 az network watcher packet-capture stop --location 'eastus' --name 'myVM_1'
 ```
 
+---
+
 > [!NOTE]
 > The cmdlet doesn't return a response whether ran on a currently running capture session or a session that has already stopped.
 ---