patch 8.2.2164: Vim9: autoload function doesn't work in uppercased script

Problem:    Vim9: autoload function doesn't work in script that starts with
            an upper case letter.
Solution:   Check for the autoload character. (closes #7502)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2164,
 /**/
     2163,
 /**/