fix doxygen link and change style to be less prominent

mythtv/libs/libmythtv/dbcheck.cpp

@@ -206,7 +206,7 @@ analog channels, us, us-cable, pal, etc.
 \section channel_table Channel Table (channel)
 The primary key, 'chanid' is generated by multiplying the sourceid times
 1000 and adding the channel number to create a unique chanid.
-\sa ChannelUtil::CreateChanId
+See also ChannelUtil::CreateChanId() .
 
 The 'channum' field contains the channel number to be input to jump
 to a channel.