patch 8.2.2998: Vim9: disassemble test fails

Problem:    Vim9: disassemble test fails.
Solution:   Add missing call to lookup_debug_var().
diff --git a/src/version.c b/src/version.c
index ee3db22..05b4a51 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2998,
+/**/
     2997,
 /**/
     2996,