docs: fix outdated comment on rebuild debounce behaviour

Jacky Zhao

2024-01-31 355aa2231879468bf9b08d1322710619c8d1fdb1

 quartz/components/styles/toc.scss

@@ -30,6 +30,7 @@
  overflow: hidden;
  max-height: none;
  transition: max-height 0.5s ease;
  position: relative;

  &.collapsed > .overflow::after {
    opacity: 0;