meson: Update libadwaita version to match latest

The libadwaita version has changed on the repository and now it's a
lower version number:

faa9f26a2b

meson.build

@@ -13,7 +13,7 @@ dependency('glib-2.0', version: '>= 2.66')
 dependency('gio-2.0', version: '>= 2.66')
 dependency('gtk4', version: '>= 4.0.0')
 dependency(
-  'libadwaita-1', version: '>= 1.1.0',
+  'libadwaita-1', version: '>= 1.0.0-alpha.1',
   fallback: ['libadwaita', 'libadwaita_dep'],
   default_options: ['tests=false', 'examples=false', 'vapi=false']
 )