[gnome-tweaks] Prepare 42.beta release info

[Evan Welsh <ewlsh src gnome org>]

commit 23395c214d249216c4d2a651525752333ce4ab14
Author: Evan Welsh <contact evanwelsh com>
Date:   Fri Mar 4 22:10:57 2022 -0800

    Prepare 42.beta release info

 NEWS                                 | 12 ++++++++++++
 data/org.gnome.tweaks.appdata.xml.in |  8 ++++++++
 2 files changed, 20 insertions(+)
---
diff --git a/NEWS b/NEWS
index d20e524..dcae8dc 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,15 @@
+42.beta
+=======
+Beta release.
+
+GNOME Tweaks 42 focuses on removing tweaks which are now duplicated by
+Settings. Additionally, Tweaks 42 marks the GTK theme tweak as "Legacy".
+In GNOME 42, the "Legacy Applications" setting will only apply to some
+GTK3 apps and a limited set of GTK4 apps. Most core GNOME apps will
+instead respect the user's dark and light mode preference via libadwaita.
+Users interested in theming can continue to do so using more advanced
+options such as the GTK_THEME environment variable. 
+
 40.0
 =======
 Stable release.
diff --git a/data/org.gnome.tweaks.appdata.xml.in b/data/org.gnome.tweaks.appdata.xml.in
index d36b82c..8e8b9b3 100644
--- a/data/org.gnome.tweaks.appdata.xml.in
+++ b/data/org.gnome.tweaks.appdata.xml.in
@@ -18,6 +18,14 @@
   </p>
   </description>
   <releases>
+    <release version="42.beta" date="2022-03-04">
+      <ul>
+        <li>Fix GNOME Extensions link</li>
+        <li>Clarify legacy GTK theme setting</li>
+        <li>Remove tweaks duplicated in Settings</li>
+        <li>Update translations</li>
+      </ul>
+    </release>
     <release version="40.0" date="2021-03-27">
       <p>
           First stable release for GNOME 40. This version is mainly comprised