Update dash_wrapper.py (#50)

Author: delsim

django_plotly_dash/dash_wrapper.py

@@ -482,7 +482,7 @@ def index(self, *args, **kwargs):  # pylint: disable=unused-argument
             _app_entry = '''
 <div id="react-entry-point">
   <div class="_dash-loading">
-    Loading Django-Plotly-Dash app
+    Loading...
   </div>
 </div>
 '''