protocols: use tablet-v2 xml from stable/

protocols/meson.build

@@ -7,10 +7,10 @@ wayland_scanner = find_program(
 )
 
 protocols = [
+	wl_protocol_dir / 'stable/tablet/tablet-v2.xml',
 	wl_protocol_dir / 'stable/xdg-shell/xdg-shell.xml',
 	wl_protocol_dir / 'unstable/xdg-output/xdg-output-unstable-v1.xml',
 	wl_protocol_dir / 'unstable/pointer-constraints/pointer-constraints-unstable-v1.xml',
-	wl_protocol_dir / 'unstable/tablet/tablet-unstable-v2.xml',
 	wl_protocol_dir / 'unstable/linux-dmabuf/linux-dmabuf-unstable-v1.xml',
 	wl_protocol_dir / 'staging/content-type/content-type-v1.xml',
 	wl_protocol_dir / 'staging/cursor-shape/cursor-shape-v1.xml',