runtime(doc): clarify the effect of the timeout for search()-functions

related: #15657
related: #15404

Signed-off-by: Christian Brabandt <[email protected]>

Author: chrisbra

runtime/doc/builtin.txt

@@ -1,4 +1,4 @@
-*builtin.txt*	For Vim version 9.1.  Last change: 2024 Aug 08
+*builtin.txt*	For Vim version 9.1.  Last change: 2024 Sep 10
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -8963,6 +8963,9 @@ search({pattern} [, {flags} [, {stopline} [, {timeout} [, {skip}]]]])
 		{timeout} is 500 the search stops after half a second.
 		The value must not be negative.  A zero value is like not
 		giving the argument.
+
+		Note: the timeout is only considered when searching, not
+		while evaluating the {skip} expression.
 		{only available when compiled with the |+reltime| feature}
 
 		If the {skip} expression is given it is evaluated with the