Update resources.html

Rephrase for Codex, the design system

resources.html

@@ -67,7 +67,7 @@ <h2>Components – WikimediaUI theme</h2>
 							<li class="resources-table__cell"><a class="lnk-resource" href="resources/WikimediaUI-components_overview.svg" target="_blank" rel="noopener">Download SVG</a></li>
 						</ul>
 						<ul class="resources-table__body">
-							<li class="resources-table__cell"><strong>Codex</strong><br>&nbsp;<br>Codex is a toolkit for building user interfaces within the Wikimedia Design System.</li>
+							<li class="resources-table__cell"><strong>Codex</strong><br>&nbsp;<br>Codex is the design system for Wikimedia – the successor of the Wikimedia Design Style Guide – and provides a toolkit for building user interfaces.</li>
 							<li class="resources-table__cell"><a href="https://doc.wikimedia.org/codex/latest/" target="_blank" rel="noopener">Demo &amp; Documentation</a></li>
 							<li class="resources-table__cell"><a href="https://github.com/wikimedia/codex" target="_blank" rel="noopener">Source Code</a></li>
 						</ul>