feat(template): add link to the GitHub contributors page

internal/template/templates/views/about.html

@@ -40,7 +40,7 @@
 <div class="panel">
     <h3>{{ t "page.about.credits" }}</h3>
     <ul>
-        <li><strong>{{ t "page.about.author" }}</strong> Frédéric Guillot</li>
+        <li><strong>{{ t "page.about.author" }}</strong> Frédéric Guillot and <a href="https://github.com/miniflux/v2/graphs/contributors">contributors</a></li>
         <li><strong>{{ t "page.about.license" }}</strong> <a href="https://www.apache.org/licenses/LICENSE-2.0">Apache 2.0</a></li>
     </ul>
 </div>