patch 8.2.1797: Vim9: some parts of the code not tested

Problem:    Vim9: some parts of the code not tested.
Solution:   Add a few tests.
diff --git a/src/version.c b/src/version.c
index 09109b0..914e4f0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1797,
+/**/
     1796,
 /**/
     1795,