patch 8.2.3704: Vim9: cannot use a list declaration in a :def function

Problem:    Vim9: cannot use a list declaration in a :def function.
Solution:   Make it work.
diff --git a/src/version.c b/src/version.c
index a190af5..32efc5c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3704,
+/**/
     3703,
 /**/
     3702,