docs(syntax-highlighting): document using different themes for light and

dark modes

Author: micahkepe

README.md

@@ -244,10 +244,13 @@ highlight_theme = "css"  # Required for class-based highlighting
 # Specify theme(s) for dark and light modes
 highlight_themes_css = [
   { theme = "one-dark", filename = "syntax/syntax-theme-dark.css" },
-  { theme = "one-dark", filename = "syntax/syntax-theme-light.css" },
+  { theme = "gruvbox-dark", filename = "syntax/syntax-theme-light.css" },
 ]
 ```
 
+For example, the above configuration will use the `one-dark` theme for dark mode
+and the `gruvbox-dark` theme for light mode.
+
 ##### Choosing Themes
 
 1. Browse available themes at [Zola's syntax highlighting

content/configuration/index.md

@@ -204,10 +204,14 @@ highlight_theme = "css"  # Required for class-based highlighting
 # Specify theme(s) for dark and light modes
 highlight_themes_css = [
   { theme = "one-dark", filename = "syntax/syntax-theme-dark.css" },
-  { theme = "one-dark", filename = "syntax/syntax-theme-light.css" },
+  { theme = "gruvbox-dark", filename = "syntax/syntax-theme-light.css" },
 ]
 ```
 
+For example, the above configuration will use the `one-dark` theme for dark mode
+and the `gruvbox-dark` theme for light mode. **You can see this in action by
+toggling the theme at the top of this page.**
+
 ##### Choosing Themes
 
 1. Browse available themes at [Zola's syntax highlighting