libadwaita: upgrade 1.3.3 -> 1.3.4

=============
Version 1.3.4
=============

- AdwAboutWindow
  - Fix :translator-credits property
- AdwComboRow
  - Fix accessible role on the dropdown arrow
- AdwEntryRow
  - Fix accessibility
- AdwLeaflet
  - Fix back/forward mouse button handling
- AdwTabBar
  - Fix accessibility
- AdwTabThumbnail
  - Fix duplicate thumbnail during transitions
  - Fix the transition curve
- AdwViewSwitcher
  - Set correct accessible role for icons
- AdwWindowTitle
  - Fix initial title visibility
- Stylesheet
  - Fix .card buttons within .osd
  - Fix single-item menu height

Signed-off-by: Markus Volk <f_l_k@t-online.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>