patch 8.2.1377: triggering the ATTENTION prompt causes typeahead mess up

Problem:    Triggering the ATTENTION prompt causes typeahead to be messed up.
Solution:   Increment tb_change_cnt. (closes #6541)
diff --git a/src/version.c b/src/version.c
index 53e47bf..f5eb42b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1377,
+/**/
     1376,
 /**/
     1375,