Try config fix

Author: mbuotidem

config.toml

@@ -15,7 +15,7 @@ taxonomies = [{ name = "tags", feed = true }]
 [markdown]
 # Whether to do syntax highlighting
 # Theme can be customised by setting the `highlight_theme` variable to a theme supported by Zola
-highlight_code = true
+highlighting = true
 highlight_theme = "css"