docs: scheduler: completion: Fix minor error in pseudo-code

Add missing address-of (&) operator in pseudo-code.

Signed-off-by: Rick Wertenbroek <[e-mail]>
Signed-off-by: Jonathan Corbet <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

Documentation/scheduler/completion.rst

···
 
 	/* run non-dependent code */		/* do setup */
 
-	wait_for_completion(&setup_done);	complete(setup_done);
+	wait_for_completion(&setup_done);	complete(&setup_done);
 
 This is not implying any particular order between wait_for_completion() and
 the call to complete() - if the call to complete() happened before the call