fix: responsive youtube embed (closes #1167)

Jacky Zhao

2024-08-06 ca3943b5007ea7cb6a27bbf3e02648d5271231ea

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.content-meta {
  margin-top: 0;
  color: var(--gray);
 
  &[show-comma="true"] {
    > span:not(:last-child) {
      margin-right: 8px;
 
      &::after {
        content: ",";
      }
    }
  }
}