4.12.0 (stable) 2024-11-04:

* dropdown/complex example: Add a missing signal_unbind().connect()
  (Dawid Chemloul) Merge request !22
* book/buildapp/step6, step7, step8, step9 and book/searchbar examples:
  Use Gtk::SearchEntry2 if gtkmm-4.0 >= 4.13.2
* index-in.docbook: Avoid <programlisting> elements within <para> elements.
  Can confuse the translation tools (itstool and friends)
  (Kjell Ahlstedt)
* Remove link to developer-old.gnome.org
  (Kjell Ahlstedt) Issue #21 (Andre Klapper)
* Add example and description of mouse events
  (Kjell Ahlstedt) Issue #23 (Petr Talla)
* Add support for code syntax highlighting in generated html files
  (Sid) Issue #24, merge request !23