patch 8.2.3503: Vim9: using g:pat:cmd is confusing

Problem:    Vim9: using g:pat:cmd is confusing.
Solution:   Do not recognize g: as the :global command.  Also for s:pat:repl.
            (closes #8982)

src/version.c

@@ -757,6 +757,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3503,
 /**/
     3502,
 /**/