patch 8.2.2857: Vim9: exception in ISN_INSTR caught at wrong level

Problem:    Vim9: exception in ISN_INSTR caught at wrong level.
Solution:   Set the starting trylevel in exec_instructions(). (closes #8214)
diff --git a/src/version.c b/src/version.c
index 70e02ed..e45d3be 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2857,
+/**/
     2856,
 /**/
     2855,