fix(nit): make defaultOptions on explorer not a function

Jacky Zhao

2023-09-19 1bf7e3d8b3966590ebfa3418d6fb2ce6a520c846

 quartz/components/styles/legacyToc.scss

@@ -12,7 +12,7 @@
      margin: 0;
    }
  }
    

  & ul {
    list-style: none;
    margin: 0.5rem 1.25rem;