patch 8.2.4868: when closing help window autocmds triggered for wrong window

Problem:    When closing help window autocmds triggered for the wrong window.
Solution:   Figure out the new current window earlier. (closes #10348)
diff --git a/src/version.c b/src/version.c
index d04a226..ca9fae2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4868,
+/**/
     4867,
 /**/
     4866,