fix: frontmatter coercion (empty string is falsy)

Jacky Zhao

2023-12-09 2c69b0c97d40f76363d20478cb799ce4b7518e56

 quartz/components/styles/clipboard.scss

@@ -10,7 +10,6 @@
  background-color: var(--light);
  border: 1px solid;
  border-radius: 5px;
  z-index: 1;
  opacity: 0;
  transition: 0.2s;