patch 8.2.4745: using wrong flag for using bell in the terminal

Problem:    Using wrong flag for using bell in the terminal.
Solution:   Change to use BO_TERM.
diff --git a/src/version.c b/src/version.c
index 584410a..7a8f52f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4745,
+/**/
     4744,
 /**/
     4743,