fix(analytics): umami custom host should be a string (closes #852)

Jacky Zhao

2024-02-12 a7325eadc1483c181928425a4c7379427f21995a

 quartz/components/Header.tsx

@@ -9,7 +9,7 @@
  display: flex;
  flex-direction: row;
  align-items: center;
  margin: 2em 0;
  margin: 2rem 0;
  gap: 1.5rem;
}