Add link to other Mastodon apps

templates/activities/home.html

@@ -29,7 +29,9 @@
         <p>
             To see your timelines, compose and edit messages, and follow people,
             you will need to use a Mastodon-compatible app. Our favourites
-            are listed below, but there's lots more options out there!
+            are listed below, but there's
+            <a href="https://joinmastodon.org/apps">lots more options</a>
+            out there!
         </p>
         <div class="flex-icons">
             <a href="https://elk.zone/">