docs(content/notes/config.md): Adds documentation for the new favicon support

Geoffrey Garrett

2022-06-27 a334b45b17f0966214d44a5b775c273e1ba7874b

 assets/styles/custom.scss

@@ -9,6 +9,7 @@
  --gray: #4e4e4e;
  --lightgray: #f0f0f0;
  --outlinegray: #dadada;
  --million-progress-bar-color: var(--secondary);
}

[saved-theme="dark"] {