patch 8.2.0456: Test_confirm_cmd is flaky

Problem:    Test_confirm_cmd is flaky.
Solution:   Add a term_wait() call. (closes #5854)
diff --git a/src/version.c b/src/version.c
index 51e9e37..2d29430 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    456,
+/**/
     455,
 /**/
     454,