Merge pull request #2692 from BrianSipple/add-link-to-community-slack

Add link to Ember Community Slack

Author: wifelette

source/community.html.erb

@@ -33,7 +33,7 @@ responsive: true
   </p>
 
   <p>
-    You can also join the Ember Community Slack.
+    You can also join the <a href="https://embercommunity.slack.com">Ember Community Slack</a>.
     Use <a href="https://ember-community-slackin.herokuapp.com/">the Slackin app</a> to receive an invitation.
   </p>
   <p>