message: docs: retry setting docs on sample
diff: @@ -81,12 +81,24 @@ function main(
  2, // 'UNKNOWN'
  ],
  backoffSettings: {
  + // The initial delay time, in milliseconds, between the completion
  + // of the first failed request and the initiation of the first retrying request.
  initialRetryDelayMillis: 100,
  + // The multiplier by which to increase the delay time between the completion
  + // of failed requests, and the initiation of the subsequent retrying request.
  retryDelayMultiplier: 1.3,
  + // The maximum delay time, in milliseconds, between requests.
  + // When this value is reached, retryDelayMultiplier will no longer be used to increase delay time.
  maxRetryDelayMillis: 60000,
  + // The initial timeout parameter to the request.
  initialRpcTimeoutMillis: 5000,
  + // The multiplier by which to increase the timeout parameter between failed requests.
  rpcTimeoutMultiplier: 1.0,
  + // The maximum timeout parameter, in milliseconds, for a request. When this value is reached,
  + // rpcTimeoutMultiplier will no longer be used to increase the timeout.
  maxRpcTimeoutMillis: 600000,
  + // The total time, in milliseconds, starting from when the initial request is sent,
  + // after which an error will be returned, regardless of the retrying attempts made meanwhile.
  totalTimeoutMillis: 600000,
  },
  };
  