chore: bump libadwaita requirement

Co-authored-by: Andy Holmes <[email protected]>

meson.build

@@ -185,7 +185,7 @@ json_glib_version = '>= 1.6.0'
 libpeas_version = '>= 2.0.0'
 eds_version = '>= 3.34'
 sqlite_version = '>= 3.24.0'
-libadwaita_version = '>= 1.5.alpha'
+libadwaita_version = '>= 1.5'
 libportal_version = ['>= 0.6', '<= 0.7.1']
 
 libm_dep = cc.find_library('m', required: true)