docs: Fix a duplicate ID

This was causing navigation in the online docs to be confused.

diff --git a/docs/reference/gtk/migrating-3xtoy.xml b/docs/reference/gtk/migrating-3xtoy.xml
index ea4ebb439ef0c620235b27ad650560add6ca9f7d..19fd608fbd5f4cece70df51624ad01b3580eb54a 100644 (file)
--- a/docs/reference/gtk/migrating-3xtoy.xml
+++ b/docs/reference/gtk/migrating-3xtoy.xml
@@ -3,7 +3,7 @@
                "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
 <!ENTITY % local.common.attrib "xmlns:xi  CDATA  #FIXED 'http://www.w3.org/2003/XInclude'">
 ]>
-<chapter id="gtk-migrating-2-to-3">
+<chapter id="gtk-migrating-3-x-to-y">
   <title>Migrating from one GTK+ 3 release to another</title>
 
   <para>