add authenticated media client api

Signed-off-by: Jason Volk <jason@zemos.net>

src/api/client/unversioned.rs

@@ -42,6 +42,7 @@ pub(crate) async fn get_supported_versions_route(
 			"v1.3".to_owned(),
 			"v1.4".to_owned(),
 			"v1.5".to_owned(),
+			"v1.11".to_owned(),
 		],
 		unstable_features: BTreeMap::from_iter([
 			("org.matrix.e2e_cross_signing".to_owned(), true),