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.

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3761,
 /**/
     3760,
 /**/