Add Healthchecks version in the site footer

templates/base.html

@@ -224,7 +224,7 @@
         <div class="container{% if page == "checks" or page == "details" %}-fluid{% endif %}">
             <ul>
                 <li>
-                    {% trans "Powered by Healthchecks open-source project" %}
+                    Healthchecks {% site_version %}
                     (<a href="https://github.com/healthchecks/healthchecks">github</a>,
                      <a href="https://healthchecks.io">healthchecks.io</a>)
                 </li>