runtime(doc): correct getscriptinfo() example (#14718)

When "sid" is specified, it returns a List with a single item.

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 79f3cd7..47cc92c 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1,4 +1,4 @@
-*builtin.txt*	For Vim version 9.1.  Last change: 2024 Apr 07
+*builtin.txt*	For Vim version 9.1.  Last change: 2024 May 04
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -4382,7 +4382,7 @@
 
 		Examples: >
 			:echo getscriptinfo({'name': 'myscript'})
-			:echo getscriptinfo({'sid': 15}).variables
+			:echo getscriptinfo({'sid': 15})[0].variables
 <
 gettabinfo([{tabnr}])					*gettabinfo()*
 		If {tabnr} is not specified, then information about all the