patch 8.2.4460: Vim9: wrong error for defining dict function

Problem:    Vim9: wrong error for defining dict function.
Solution:   Explicitly check for trying to define a dict function.
            (closes 9827)

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4460,
 /**/
     4459,
 /**/