fixed missing function in DockerClient

src/main/java/com/spotify/docker/client/DockerClient.java

@@ -1596,7 +1596,20 @@ ServiceCreateResponse createService(ServiceSpec spec, RegistryAuth registryAuth)
    */
   void updateService(String serviceId, Long version, ServiceSpec spec)
           throws DockerException, InterruptedException;
-
+
+  /**
+   * Update an existing service. Only available in Docker API >= 1.24.
+   *
+   * @param serviceId the identifier of the service
+   * @param version the version of the service
+   * @param spec the new service spec
+   * @param registryAuth the registry authentication configuration
+   * @throws DockerException      if a server error occurred (500)
+   * @throws InterruptedException If the thread is interrupted
+   */
+  void updateService(String serviceId, Long version, ServiceSpec spec, RegistryAuth registryAuth)
+          throws DockerException, InterruptedException;
+
   /**
    * List all services. Only available in Docker API >= 1.24.
    *