patch 8.2.4138: Vim9: no error for return with argument when invalid

Problem:    Vim9: no error for return with argument when the function does not
            return anything.
Solution:   Give an error for the invalid argument. (issue #9497)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4138,
 /**/
     4137,
 /**/