message: feat(Snackbar): add subtitle prop
diff: overflow: hidden;
  }
  +.Snackbar__content-subtitle {
  + color: var(--vkui--color_text_subhead);
  + margin-top: 2px;
  +}
  +
  .Snackbar--mode-dark .Snackbar__content-text {
  color: var(--vkui--color_text_contrast);
  }
  */
  .Snackbar--desktop {
  - max-width: 328px;
  + max-width: 351px;
  left: 0;
  bottom: 0;
  }
  