patch 8.2.4456: terminal test may fail on some machines

Problem:    Terminal test may fail on some machines.
Solution:   Increase wait time. (Zdenek Dohnal, closes #9834)
diff --git a/src/version.c b/src/version.c
index b5d93fb..0bd4991 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4456,
+/**/
     4455,
 /**/
     4454,