docs: update `hosting.md` with Vercel hosting instructions (#406)

Zane Helton

2023-08-23 632c27b7ec133d15d890eb28c98eb9716ca01407

 quartz/components/styles/toc.scss

@@ -42,9 +42,7 @@
    & > li > a {
      color: var(--dark);
      opacity: 0.35;
      transition:
        0.5s ease opacity,
        0.3s ease color;
      transition: 0.5s ease opacity, 0.3s ease color;
      &.in-view {
        opacity: 0.75;
      }