fix broken links after new nav reorganization

Author: lee2sman

overrides/404.html

@@ -29,11 +29,11 @@ <h2>Where to go from here</h2>
 
             <ul>
               <li><strong><a href="{{ config.site_url }}">Welcome to L5</a></strong>: Get started with L5 fundamentals</li>
-              <li><strong><a href="{{ config.site_url }}getting-started/">Getting Started</a></strong>: Installation and your first sketch</li>
               <li><strong><a href="{{ config.site_url }}download/">Download L5</a></strong>: Get the latest version for your platform</li>
               <li><strong><a href="{{ config.site_url }}reference/">Reference</a></strong>: Complete API documentation</li>
+              <li><strong><a href="{{ config.site_url }}tutorials/">Tutorials</a></strong>: A Complete Introduction to Programming with L5</li>
               <li><strong><a href="{{ config.site_url }}examples/">Examples</a></strong>: Learn by exploring example sketches</li>
-              <li><strong><a href="{{ config.site_url }}L5-for-processingp5/">L5 for Processing Users</a></strong>: If you know Processing, start here</li>
+              <li><strong><a href="{{ config.site_url }}tutorials/L5-for-processingp5/">L5 for Processing Users</a></strong>: If you know Processing, start here</li>
             </ul>
 
             <h2>Have trouble?</h2>