patch 8.2.0206: calling Vim9 function using default argument fails

Problem:    Calling Vim9 function using default argument fails.
Solution:   Give an appropriate error. (closes #5572)
diff --git a/src/version.c b/src/version.c
index 63461bd..1b8a0a8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    206,
+/**/
     205,
 /**/
     204,