message: quick extra link on schema docs
diff: @@ -160,6 +160,9 @@ mod custom_resource;
  /// - **using complex enums**: enums do not currently generate [structural schemas](https://kubernetes.io/docs/tasks/extend-kubernetes/custom-resources/custom-resource-definitions/#specifying-a-structural-schema), so kubernetes won't support them by default
  /// - **customizing [merge-strategies](https://kubernetes.io/docs/reference/using-api/server-side-apply/#merge-strategy)** (e.g. like in the [`crd_derive_schema` example](https://github.com/clux/kube-rs/blob/master/examples/crd_derive_schema.rs))
  /// - **customizing [certain kubebuilder like validation rules](https://github.com/clux/kube-rs/issues/129#issuecomment-749463718)** (tail the issue for state of affairs)
  +/// - **embedding k8s-openapi types** within your structs (see [k8s-openapi#86](https://github.com/Arnavion/k8s-openapi/issues/86))
  +///
  +/// See [kubernetes openapi validation](https://kubernetes.io/docs/tasks/extend-kubernetes/custom-resources/custom-resource-definitions/#validation) for the format of the OpenAPI v3 schemas.
  ///
  /// If you have to override a lot, [you can opt-out of schema-generation entirely](https://github.com/clux/kube-rs/issues/355#issuecomment-751253657)
  ///
  