message: use struct field in doc example in kube-derive
diff: @@ -147,6 +147,7 @@ use custom_resource::CustomResource;
  /// group = "clux.dev",
  /// version = "v1",
  /// kind = "Foo",
  +/// struct = "FooCrd",
  /// namespaced,
  /// status = "FooStatus",
  /// derive = "PartialEq",
  @@ -171,17 +172,17 @@ use custom_resource::CustomResource;
  /// ```ignore
  /// #[derive(Serialize, Deserialize, Debug, PartialEq, Clone, JsonSchema)]
  /// #[serde(rename_all = "camelCase")]
  -/// pub struct Foo {
  +/// pub struct FooCrd {
  /// api_version: String,
  /// kind: String,
  /// metadata: ObjectMeta,
  /// spec: FooSpec,
  /// status: Option<FooStatus>,
  /// }
  -/// impl k8s_openapi::Resource for Foo {...}
  -/// impl k8s_openapi::Metadata for Foo {...}
  +/// impl k8s_openapi::Resource for FooCrd {...}
  +/// impl k8s_openapi::Metadata for FooCrd {...}
  ///
  -/// impl Foo {
  +/// impl FooCrd {
  /// pub fn new(name: &str, spec: FooSpec) -> Self { ... }
  /// pub fn crd() -> k8s_openapi::...::CustomResourceDefinition { ... }
  /// }
  