patch 8.2.3781: the option window script is outdated

Problem:    The option window script is outdated.
Solution:   Add several changes.

runtime/optwin.vim

@@ -1,7 +1,7 @@
 " These commands create the option window.
 "
 " Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2021 Oct 28
+" Last Change:	2021 Dec 11
 
 " If there already is an option window, jump to that one.
 let buf = bufnr('option-window')

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3781,
 /**/
     3780,
 /**/