patch 8.2.2272: Vim9: extend() can violate the type of a variable

Problem:    Vim9: extend() can violate the type of a variable.
Solution:   Add the type to the dictionary or list and check items against it.
            (closes #7593)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2272,
 /**/
     2271,
 /**/