patch 8.2.0462: previewwindow test fails on some systems

Problem:    Previewwindow test fails on some systems. (James McCoy)
Solution:   Wait a bit after sending the "o". (closes #5849)
diff --git a/src/version.c b/src/version.c
index 001770e..46fd076 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    462,
+/**/
     461,
 /**/
     460,