docs: make incompability of trailing slashes clear

Jacky Zhao

2023-08-23 960c1814d07449dd9fd5e70eea770ba762780b53

 quartz/components/styles/darkmode.scss

@@ -2,6 +2,7 @@
  position: relative;
  width: 20px;
  height: 20px;
  margin: 0 10px;

  & > .toggle {
    display: none;