Change cmp scroll_docs comment to [b]ack and [f]orward

init.lua

@@ -679,9 +679,8 @@ require('lazy').setup({
           -- Select the [p]revious item
           ['<C-p>'] = cmp.mapping.select_prev_item(),
 
-          -- scroll documentation window up
+          -- scroll the documentation window [b]ack / [f]orward
           ['<C-b>'] = cmp.mapping.scroll_docs(-4),
-          -- scroll documentation window down
           ['<C-f>'] = cmp.mapping.scroll_docs(4),
 
           -- Accept ([y]es) the completion.