progressbar docs use 'progress' keyword to set value, should use 'value'

The documentation for jQuery UI progressbar says

progressbar( "progress", value ) 	Returns: jQuery
Set range of the progressbar.

http://docs.jquery.com/UI/Progressbar/progressbar

But the current source (1.6rc5) shows the required keyword for setting the value is 'value'.

The documentation should be updated to use the correct keyword.