update system-version

lib/views/widget/system-version.html

@@ -1,6 +1,6 @@
 <div class="system-version hidden-xs">
   <span>
-    <a href="https://github.com/weseek/growi">GROWI</a> {{ growiVersion() }}
+    <a href="https://growi.org">GROWI</a> {{ growiVersion() }}
   </span>
   <span>
     <a href="" data-target="#shortcuts-modal" data-toggle="modal"><i class="fa fa-keyboard-o"></i>&nbsp;<span class="cmd-key"></span>-/</a>