patch 8.2.4085: Vim9: no test for using import in legacy script

Problem:    Vim9: no test for using import in legacy script.
Solution:   Add a test.
diff --git a/src/version.c b/src/version.c
index 957ccee..5572303 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4085,
+/**/
     4084,
 /**/
     4083,