Fixed #19714 -- Updated documentation about TemplateView context

.. class:: django.views.generic.base.TemplateView

    Renders a given template, passing it a ``{{ params }}`` template variable,

    which is a dictionary of the parameters captured in the URL.

    Renders a given template, with the context containing parameters captured

    in the URL.

    .. versionchanged:: 1.5

        The context used to be populated with a ``{{ params }}`` dictionary of

        the parameters captured in the URL. Now those parameters are first-level

        context variables.

    **Ancestors (MRO)**