patch 8.2.1753: Vim9: crash when using import at script level

Problem:    Vim9: crash when using import at script level.
Solution:   Give a "not implemented yet" error. (closes #7026)
diff --git a/src/version.c b/src/version.c
index 149a3ff..f3dbf28 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1753,
+/**/
     1752,
 /**/
     1751,