Update siteConfig.js

Author: smyrick

website/siteConfig.js

@@ -41,7 +41,7 @@ const siteConfig = {
 
   highlight: {
     // Highlight.js theme to use for syntax highlighting in code blocks.
-    theme: 'default',
+    theme: 'github',
   },
 
   // Add custom scripts here that would be placed in <script> tags.