patch 8.2.2226: Vim9: script test fails

Problem:    Vim9: script test fails.
Solution:   Add missing change.
diff --git a/src/scriptfile.c b/src/scriptfile.c
index 38704a7..90d483b 100644
--- a/src/scriptfile.c
+++ b/src/scriptfile.c
@@ -1341,6 +1341,8 @@
 		di = HI2DI(hi);
 		di->di_flags |= DI_FLAGS_RELOAD;
 	    }
+	// imports can be redefined once
+	mark_imports_for_reload(sid);
     }
     else
     {