Bump release to 43.beta

NEWS

+gnome-tour 43.beta
+===================
+* Translations updates
+
 gnome-tour 42.0
 ===================
 * Translations updates

data/org.gnome.Tour.metainfo.xml.in.in

@@ -22,7 +22,7 @@
   <url type="donation">http://www.gnome.org/friends/</url>
   <content_rating type="oars-1.0" />
   <releases>
-    <release version="42.0" date="2022-03-19" />
+    <release version="43.beta" date="2022-08-07" type="development" />
     <release version="40.0" date="2021-03-23" />
     <release version="3.38.0" date="2020-09-15" />
     <release version="3.37.92" date="2020-09-08" type="development" />

meson.build

 project('gnome-tour',
         'rust',
-        version: '42.0',
+        version: '43.beta',
         license: 'GPL-3.0-or-later',
 	meson_version : '>= 0.59')