Update description for "sublimelinter_mark_style" setting
Update description for "sublimelinter_mark_style" setting

The old description did not match the default value.
benesch/sublime-linter,uschmidt83/SublimeLinter-for-ST2,SublimeLinter/SublimeLinter-for-ST2,biodamasceno/SublimeLinter-for-ST2,uschmidt83/SublimeLinter-for-ST2,SublimeLinter/SublimeLinter-for-ST2,tangledhelix/SublimeLinter-for-ST2,benesch/sublime-linter,tangledhelix/SublimeLinter-for-ST2,biodamasceno/SublimeLinter-for-ST2