fix: Fix `Backlinks` not applying the display class (#519)

Luca Salvarani

2023-10-02 c8f5dbbad3a85749d8a74f5e3e3b222fe547d5d6

 quartz/components/styles/legacyToc.scss

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

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