chore: update Two Factor to 0.11.0 (#6123)

* chore: update `Two Factor` to 0.11.0

* fix: BREAKING-841: disable U2F provider

Author: sjinks

shared-plugins/two-factor/assets/screenshot-1.png

@@ -50,6 +50,6 @@ public function jetpack_rememberme( $rememberme ) {
 	 * @return boolean
 	 */
 	public function jetpack_is_sso_active() {
-		return ( method_exists( 'Jetpack', 'is_module_active' ) && Jetpack::is_module_active( 'sso' ) );
+		return ( class_exists( 'Jetpack' ) && method_exists( 'Jetpack', 'is_module_active' ) && Jetpack::is_module_active( 'sso' ) );
 	}
 }