patch 8.2.3781: the option window script is outdated

Problem:    The option window script is outdated.
Solution:   Add several changes.
diff --git a/runtime/optwin.vim b/runtime/optwin.vim
index 38bc87e..91824f8 100644
--- a/runtime/optwin.vim
+++ b/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')
diff --git a/src/version.c b/src/version.c
index 680cce2..cf57243 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3781,
+/**/
     3780,
 /**/
     3779,