patch 8.2.4508: Vim9: cannot assign to a global variable on the command line

Problem:    Vim9: cannot assign to a global variable on the command line.
Solution:   Allow using :vim9cmd for assignment on the command line.
diff --git a/src/version.c b/src/version.c
index 2e22a77..5bbd307 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4508,
+/**/
     4507,
 /**/
     4506,