grub.cfg: increase default timeout to 10 seconds

this is a compromise. i was going to do 30 for desktops, 1 for laptops.
however, some laptop users complain about the 1 second timeout being too fast.
10 seconds should just about please everyone.

resources/grub/config/grub.cfg

@@ -25,7 +25,7 @@ terminal_output --append gfxterm
 
 # Default to first option, automatically boot after 1 second
 set default="0"
-set timeout=1
+set timeout=10
 
 # This is useful when using 'cat' on long files on GRUB terminal
 set pager=1