fix nested callout folding

Jacky Zhao

2023-08-12 c89f8b1a9a20becd982ed0b4bc88b1685a15832d

 quartz/styles/callouts.scss

@@ -7,6 +7,7 @@
  padding: 0 1rem;
  overflow-y: hidden;
  transition: max-height 0.3s ease;
  box-sizing: border-box;

  & > *:nth-child(2) {
    margin-top: 0;