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 <[e-mail]>
Reviewed-by: Randy Dunlap <[e-mail]>
Tested-by: Randy Dunlap <[e-mail]>
Signed-off-by: Jiri Kosina <[e-mail]>

Documentation/hid/hid-alps.rst

···
 The command format is as below.
 
 DataByte(SET_REPORT)
+~~~~~~~~~~~~~~~~~~~~
 
 =====	======================
 Byte1	Command Byte
···
 When you read RAM, there is no meaning.
 
 DataByte(GET_REPORT)
+~~~~~~~~~~~~~~~~~~~~
 
 =====	======================
 Byte1	Response Byte