Documentation: hid-alps: Format DataByte* subsection headings

"Command Read/Write" section has two DataByte* subsections describing
command bytes format. Add markup to these subsection heading texts.

Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

Author: bagasme

Documentation/hid/hid-alps.rst

@@ -69,6 +69,7 @@ To read/write to RAM, need to send a command to the device.
 The command format is as below.
 
 DataByte(SET_REPORT)
+~~~~~~~~~~~~~~~~~~~~
 
 =====	======================
 Byte1	Command Byte
@@ -89,6 +90,7 @@ Value Byte is writing data when you send the write commands.
 When you read RAM, there is no meaning.
 
 DataByte(GET_REPORT)
+~~~~~~~~~~~~~~~~~~~~
 
 =====	======================
 Byte1	Response Byte