Documentation: kunit: change complete_and_exit to kthread_complete_and_exit

Commit cead1855 ("exit: Rename complete_and_exit to
kthread_complete_and_exit") renamed complete_and_exit to
kthread_complete_and_exit.
Signed-off-by: Andreas-Christian Hagau <ach@hagau.se>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/dev-tools/kunit/architecture.rst

@@ -125,7 +125,7 @@ All expectations/assertions are formatted as:
 		  ``void __noreturn kunit_try_catch_throw(struct kunit_try_catch *try_catch)``.
 
 		- ``kunit_try_catch_throw`` calls function:
-		  ``void complete_and_exit(struct completion *, long) __noreturn;``
+		  ``void kthread_complete_and_exit(struct completion *, long) __noreturn;``
 		  and terminates the special thread context.
 
 - ``<op>`` denotes a check with options: ``TRUE`` (supplied property