patch 8.2.4044: Vim9: no error when importing the same script twice

Problem:    Vim9: no error when importing the same script twice.
Solution:   Give an error, unless it is a reload.
diff --git a/src/version.c b/src/version.c
index cdfadeb..86ab085 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4044,
+/**/
     4043,
 /**/
     4042,