patch 8.2.2789: Vim9: using \=expr in :substitute does not handle jumps

Problem:    Vim9: using \=expr in :substitute does not handle jumps.
Solution:   Start with instruction count zero. (closes #8128)
diff --git a/src/version.c b/src/version.c
index 1926724..86d6f36 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2789,
+/**/
     2788,
 /**/
     2787,