feat: support youtube playlist iframe (#968)

Emile Bangma

2024-03-06 e13cafe070885b0bc5c2642324342a8e957006b2

 quartz/components/styles/footer.scss

@@ -1,6 +1,8 @@
footer {
  text-align: left;
  opacity: 0.8;
  margin-bottom: 4rem;
  opacity: 0.7;

  & ul {
    list-style: none;
    margin: 0;