scsi: docs: megaraid: Clarify chapter heading

Include "Megaraid" in the chapter heading so that it is clear
what subject the document is about. This improves viewing in the TOC.

Signed-off-by: Randy Dunlap <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Cc: "James E.J. Bottomley" <[e-mail]>
Cc: "Martin K. Petersen" <[e-mail]>
Cc: [e-mail]
Cc: Jonathan Corbet <[e-mail]>
Cc: [e-mail]
Cc: Kashyap Desai <[e-mail]>
Cc: Sumit Saxena <[e-mail]>
Cc: Shivasharan S <[e-mail]>
Cc: [e-mail]
Signed-off-by: Martin K. Petersen <[e-mail]>

Documentation/scsi/megaraid.rst

···
 .. SPDX-License-Identifier: GPL-2.0
 
-==========================
-Notes on Management Module
-==========================
+=================================
+Megaraid Common Management Module
+=================================
 
 Overview
 --------