patch 8.2.4174: Vim9: can use an autoload name in normal script

Problem:    Vim9: can use an autoload name in normal script.
Solution:   Disallow using an autoload name.
diff --git a/src/version.c b/src/version.c
index a9a8323..edf26ed 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4174,
+/**/
     4173,
 /**/
     4172,