improve text

Author: hauner

src/partials/oap-article-404.hbs

@@ -5,7 +5,7 @@
 </div>
 <div class="paragraph">
 <p>If you arrived on this page by clicking on a link, please notify the owner of the site that the link is broken.
-If you typed the URL of this page manually, please double check that you entered the address correctly.</p>
+If you typed the URL of this page manually, please double-check that you entered the address correctly.</p>
 </div>
 <div id="redirect" class="paragraph"></div>
 </article>