feat(pageheader): Add link to bibliography page

Author: jmiguelv

frontend/src/lib/components/PageHeader.svelte

@@ -25,6 +25,7 @@
 		</ul>
 		<ul>
 			<li><BaseLink href="/about">About</BaseLink></li>
+			<li><BaseLink href="/bibliography">Bibliography</BaseLink></li>
 			<li>Guide</li>
 			{#if dev && debug}
 				<li><BaseLink href="/_styleguide">Style Guide</BaseLink></li>