patch 8.2.3761: focus change is not passed on to a terminal window

Problem:    Focus change is not passed on to a terminal window.
Solution:   If the current window is a terminal and focus events are enabled
            send a focus event escape sequence to the terminal.
diff --git a/src/version.c b/src/version.c
index 3f0b5fd..0864655 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3761,
+/**/
     3760,
 /**/
     3759,