message: Fix experimental message
diff: @@ -379,6 +379,9 @@ namespace vcpkg
  vcpkg::Optional<Json::Object> configuration_from_manifest;
  if (auto manifest = m_pimpl->m_manifest_doc.get())
  + {
  + auto manifest_obj = manifest->first;
  + if (auto config_obj = manifest_obj.get("vcpkg-configuration"))
  {
  print2(Color::warning,
  "Embedding `vcpkg-configuration` in a manifest file is an EXPERIMENTAL feature.\n"
  @@ -386,9 +389,6 @@ namespace vcpkg
  m_pimpl->m_manifest_path,
  "\n");
  - auto manifest_obj = manifest->first;
  - if (auto config_obj = manifest_obj.get("vcpkg-configuration"))
  - {
  if (!config_obj->is_object())
  {
  print2(Color::error,
  