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.

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4508,
 /**/
     4507,
 /**/