test-renderers: Fix gltf-render build.

Forgot to update it when I changed the signature of `harness_main()`.

test-renderers/tests/gltf-render.rs

@@ -26,6 +26,7 @@ async fn main() -> test_renderers::HarnessResult {
     test_renderers::harness_main(
         test_renderers::HarnessArgs::parse(),
         RendererId::Gltf,
+        test_renderers::SuiteId::Renderers,
         test_renderers::test_cases::all_tests,
         get_factory,
         None,