patch 8.2.4297: Vim9: not all code covered by tests

Problem:    Vim9: not all code covered by tests.
Solution:   Add a couple more tests.
diff --git a/src/version.c b/src/version.c
index 503f873..95f2b5f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4297,
+/**/
     4296,
 /**/
     4295,