patch 8.2.1403: Vim9: Vim highlighting may fail in cmdline window

Problem:    Vim9: Vim highlighting fails in cmdline window if it uses Vim9
            commands.
Solution:   Allow using :vim9script, :import and :export while in the cmdline
            window. (closes #6656)
diff --git a/src/version.c b/src/version.c
index 697a47c..ddd4354 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1403,
+/**/
     1402,
 /**/
     1401,