message: [vcpkg] link documentation when using bad identifiers
diff: @@ -1372,7 +1372,10 @@ namespace vcpkg::Json
  {
  if (!is_ident(sv))
  {
  - r.add_generic_error(type_name(), "must be lowercase alphanumeric+hyphens and not reserved");
  + r.add_generic_error(type_name(),
  + "must be lowercase alphanumeric+hyphens and not reserved (see "
  + "https://github.com/Microsoft/vcpkg/tree/master/docs/specifications/manifests.md for "
  + "more information)");
  }
  return sv.to_string();
  }
  