docs(config.md): Added short explainer on favicons

Geoffrey Garrett

2022-06-27 997937af5a6dc317da56ae294dce927ec5930a4b

 assets/styles/custom.scss

@@ -22,5 +22,4 @@
  --gray: #d4d4d4 !important;
  --lightgray: #292633 !important;
  --outlinegray: #343434 !important;
  --million-progress-bar-color: var(--secondary) !important;
}