fix: correct regression with code highlighting in dark mode (#760)

Robert Tucker

10.52.2023 6407a2039bca448ee0dee1f5fe8fddfe969ef03c

 assets/scss/_base_dark.scss

@@ -42,7 +42,7 @@
  .highlight {
    pre {
      background-color: $alt-bg-color-dark;
      color: $fg-color-dark;
      color: $bg-color-dark;

      code {
        background-color: inherit;