patch 8.2.1864: Vim9: no error for wrong list type

Problem:    Vim9: no error for wrong list type.
Solution:   Add flag to indicate a constant. (closes #7160)
diff --git a/src/version.c b/src/version.c
index 3b19fd5..ef5ea87 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1864,
+/**/
     1863,
 /**/
     1862,