Add intro header to office_ms17_11882

Author: cbrnrd

documentation/modules/exploit/windows/fileformat/office_ms17_11882.md

@@ -1,7 +1,8 @@
+## Introduction
 
 Module exploits a flaw in how the Equation Editor that allows an attacker to execute arbitrary code in RTF files without interaction. The vulnerability is caused by the Equation Editor, to which fails to properly handle OLE objects in memory.
 
-## Vulnerable Application
+## Vulnerable Applications
 
 - Microsoft Office 2016
 - Microsoft Office 2013 Service Pack 1
@@ -15,6 +16,7 @@ Module exploits a flaw in how the Equation Editor that allows an attacker to exe
 3. Do: `set PAYLOAD [PAYLOAD]`
 4. Do: `run`
 
+
 ## Options
 ### FILENAME
 Filename to output & if injecting a file, the file to inject