[gtk/wip/baedert/for-master] migration guide: Remove a stray html tag

[Timm Bäder <baedert src gnome org>]

commit de0547ede7f296e3af31bd47fb4b0bb03e6c48fc
Author: Timm Bäder <mail baedert org>
Date:   Fri Jul 17 06:27:23 2020 +0200

    migration guide: Remove a stray html tag

 docs/reference/gtk/migrating-3to4.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/docs/reference/gtk/migrating-3to4.md b/docs/reference/gtk/migrating-3to4.md
index d78ed134e6..fb266bb87d 100644
--- a/docs/reference/gtk/migrating-3to4.md
+++ b/docs/reference/gtk/migrating-3to4.md
@@ -170,7 +170,7 @@ in GTK 3, you can prepare for the switch by using gtk_widget_destroy()
 only on toplevel windows, and replace all other uses with
 gtk_container_remove() or g_object_unref().
 
-### Reduce the use of generic container APIs</title>
+### Reduce the use of generic container APIs
 
 GTK 4 removes gtk_container_add() and gtk_container_remove(). While there
 is not always a replacement for gtk_container_remove() in GTK 3, you can