Add introduction header to web_delivery

documentation/modules/exploit/multi/script/web_delivery.md

@@ -1,3 +1,5 @@
+## Introduction
+
 The web_delivery module provides a stealthy way to deliver a payload during post exploitation over HTTP or HTTPS. Because the payload does not touch the disk, it can easily bypass many anti-virus protections.
 
 The web_delivery module supports three different languages for delivery: Python, PHP, and
@@ -5,6 +7,7 @@ Powershell. You should manually select the correct target based on the victim en
 
 For example, if you have gained remote access through a PHP application, it is likely you can use PHP. If you are in a modern Windows server environment, then you can usually assume the target supports Powershell as well.
 
+
 ## Verification Steps
 
 To use the web_delivery module, you must first gain access to the target host and be able to execute either a Python, PHP, or Powershell interpreter. Then, follow these steps to proceed with exploitation: