message: Update to fix the broken blueprints link
  * Updated to fix the broken blueprints link
  The current link is which redirects to a non-existent page. The new link is
  * Link to the current Flask version(1.0.x)
diff: @@ -1054,7 +1054,7 @@ your environment. See `CONTRIBUTING.md#setup-local-environment-for-development <
  Blueprints
  ----------
  -`Blueprints are Flask's reusable apps <http://flask.pocoo.org/docs/0.12/blueprints/>`_.
  +`Blueprints are Flask's reusable apps <https://flask.palletsprojects.com/en/1.0.x/tutorial/views/>`_.
  Superset allows you to specify an array of Blueprints
  in your ``superset_config`` module. Here's
  an example of how this can work with a simple Blueprint. By doing
  