docs: Fix type URI for custom_response example (#27329)

Signed-off-by: pchaseh <chase@path.net>

Mirrored from https://github.com/envoyproxy/envoy @ 54daa8cd0eef38d869a27ae8506ca8de14d07efc

envoy/extensions/filters/http/custom_response/v3/custom_response.proto

@@ -48,7 +48,7 @@ message CustomResponse {
   //         action:
   //           name: action
   //           typed_config:
-  //             "@type": type.googleapis.com/envoy.extensions.filters.http.custom_response.v3.LocalResponsePolicy
+  //             "@type": type.googleapis.com/envoy.extensions.http.custom_response.local_response_policy.v3.LocalResponsePolicy
   //             status_code: 499
   //             body:
   //               inline_string: "not allowed"
@@ -89,7 +89,7 @@ message CustomResponse {
   //         action:
   //           name: action
   //           typed_config:
-  //             "@type": type.googleapis.com/envoy.extensions.filters.http.custom_response.v3.RedirectPolicy
+  //             "@type": type.googleapis.com/envoy.extensions.http.custom_response.redirect_policy.v3.RedirectPolicy
   //             status_code: 299
   //             uri: "https://foo.example/gateway_error"
   //             response_headers_to_add: