fix: use git dates by default, @napi/git is fast enough

Jacky Zhao

2023-09-15 5dcb7e83fc3c8383ebbc84aac4553df4ad3ef59a

 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;
}