fix(docs): make docs accurate to callout behaviour (closes #920)

Jacky Zhao

2024-02-23 be9b6b3a1e2038ea0a985ebd37fb18a661bddd04

 quartz/styles/callouts.scss

@@ -157,6 +157,6 @@
  }

  .callout-title-inner {
    font-weight: $boldWeight;
    font-weight: $semiBoldWeight;
  }
}