patch 8.2.3866: Vim9: type checking global variables is inconsistent

Problem:    Vim9: type checking global variables is inconsistent.
Solution:   Use the "unknown" type in more places.
diff --git a/src/version.c b/src/version.c
index 90b35d3..2c46608 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3866,
+/**/
     3865,
 /**/
     3864,