Update index.html

Author: swisspol

index.html

@@ -190,7 +190,7 @@ <h4 class="download-title">
       </p>
 
       <p>
-        Read the <a href="http://forums.gitup.co/c/docs">docs</a> and visit the <a href="http://forums.gitup.co/">community forums</a> for support &amp; feedback.
+        Read the <a href="https://github.com/git-up/GitUp/wiki">docs</a> and use <a href="https://github.com/git-up/GitUp/issues">GitHub Issues</a> for support &amp; feedback.
       </p>
     </div>
   </section>