[http_request] allow retrieval of more than just the first header (#9242)

esphome/components/http_request/http_request_arduino.cpp

@@ -133,7 +133,6 @@ std::shared_ptr<HttpContainer> HttpRequestArduino::perform(std::string url, std:
       std::string header_value = container->client_.header(i).c_str();
       ESP_LOGD(TAG, "Received response header, name: %s, value: %s", header_name.c_str(), header_value.c_str());
       container->response_headers_[header_name].push_back(header_value);
-      break;
     }
   }