message: Add outline vkui token
diff: .PromoBanner {
  width: 100%;
  box-sizing: border-box;
  - outline: 1px solid var(--separator_alpha);
  + outline: var(--thin-border) solid
  + var(--separator_alpha, var(--vkui--color_separator_primary_alpha));
  color: var(--text_primary, var(--vkui--color_text_primary));
  background: var(--background_content, var(--vkui--color_background_content));
  padding-bottom: 10px;
  