UI Libraries: Fix wrong URL for characters project.

src/templates/libraries.pug

@@ -54,7 +54,7 @@ include mixins/components
 	+category_list_item(
 		'CHARACTERS',
 		'Production quality, fully rigged and shaded characters ready to animate.',
-		"{{ url_for('projects.view', project_url='hdri') }}",
+		"{{ url_for('projects.view', project_url='characters') }}",
 		"{{ url_for('static', filename='assets/img/features/characters_01.jpg')}}")
 | {% endblock body %}