patch 8.2.4697: Vim9: crash when adding a duplicate key to a dictionary

Problem:    Vim9: crash when adding a duplicate key to a dictionary.
Solution:   Clear the stack item when it has been moved into the dictionary.
            (closes #10087)

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4697,
 /**/
     4696,
 /**/