[vala] Created tag 0.56.1

[Rico Tzschichholz <ricotz src gnome org>]

The signed tag '0.56.1' was created.

Tagger: Rico Tzschichholz <ricotz ubuntu com>
Date: 1650652658 +0200

    0.56.1

Changes since the last tag '0.56.0':

Lorenz Wildberg (1):
      Add release notes for 0.56

Rico Tzschichholz (10):
      gstreamer: Update from 1.21+ git main
      vapi: Update GIR-based bindings
      vala: Don't allow nullable enum value as real GObject property
      vala: Improve accessibility check inside member initializer
      valadoc: Include path to doclet in error message
      gtk4: Split out gtk4-wayland and gtk4-x11 into separate bindings
      gstreamer: Update from 1.21.0+ git main
      vapi: Update GIR-based bindings
      manual: Update from wiki.gnome.org
      Release 0.56.1

m-shinder (1):
      gtk4: Fix GLib.Value parameter in ContentProvider.get_value()