scsi: docs: sym53c8xx_2: Shorten chapter heading

Make the chapter heading concise yet still descriptive.
This makes the subsystem table of contents more readable (IMO).

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: Matthew Wilcox <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

Documentation/scsi/sym53c8xx_2.rst

···
 .. SPDX-License-Identifier: GPL-2.0
 
-=========================================
-The Linux SYM-2 driver documentation file
-=========================================
+============
+SYM-2 driver
+============
 
 Written by Gerard Roudier <[e-mail]>