patch 8.2.1359: Vim9: cannot assign to / register in Vim9 script

Problem:    Vim9: cannot assign to / register in Vim9 script.
Solution:   Adjust check for assignment in Vim9 script. (closes #6567)

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1359,
 /**/
     1358,
 /**/