patch 8.2.3844: Vim9: no type error if assigning func(number) to func(string)

Problem:    Vim9: no type error if assigning a value with type func(number) to
            a variable of type func(string).
Solution:   Use check_type_maybe(): return MAYBE if a runtime type check is
            useful.  (issue #8492)

src/version.c

@@ -749,6 +749,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3844,
 /**/
     3843,
 /**/