message: Update docs for pinot support
diff: @@ -382,6 +382,8 @@ Here's a list of some of the recommended packages.
  +---------------+-------------------------------------+-------------------------------------------------+
  | Teradata | ``pip install sqlalchemy-teradata`` | ``teradata://`` |
  +---------------+-------------------------------------+-------------------------------------------------+
  +| Pinot | ``pip install pinotdb`` | ``pinot+http://controller:5436/query?server=http://controller:5983/`` |
  ++---------------+-------------------------------------+-------------------------------------------------+
  Note that many other databases are supported, the main criteria being the
  existence of a functional SqlAlchemy dialect and Python driver. Googling
  