Add Open Home Foundation logo to README (home-assistant#127111)

* Added Open Home Foundation logo to README

* Remove legacy reference to OHF website

* Add alt text to OHF logo

README.rst

@@ -7,8 +7,6 @@ Check out `home-assistant.io <https://home-assistant.io>`__ for `a
 demo <https://demo.home-assistant.io>`__, `installation instructions <https://home-assistant.io/getting-started/>`__,
 `tutorials <https://home-assistant.io/getting-started/automation/>`__ and `documentation <https://home-assistant.io/docs/>`__.
 
-This is a project of the `Open Home Foundation <https://www.openhomefoundation.org/>`__.
-
 |screenshot-states|
 
 Featured integrations
@@ -22,9 +20,14 @@ components <https://developers.home-assistant.io/docs/creating_component_index/>
 If you run into issues while using Home Assistant or during development
 of a component, check the `Home Assistant help section <https://home-assistant.io/help/>`__ of our website for further help and information.
 
+|ohf-logo|
+
 .. |Chat Status| image:: https://img.shields.io/discord/330944238910963714.svg
    :target: https://www.home-assistant.io/join-chat/
 .. |screenshot-states| image:: https://raw.githubusercontent.com/home-assistant/core/dev/.github/assets/screenshot-states.png
    :target: https://demo.home-assistant.io
 .. |screenshot-integrations| image:: https://raw.githubusercontent.com/home-assistant/core/dev/.github/assets/screenshot-integrations.png
    :target: https://home-assistant.io/integrations/
+.. |ohf-logo| image:: https://www.openhomefoundation.org/badges/home-assistant.png
+   :alt: Home Assistant - A project from the Open Home Foundation
+   :target: https://www.openhomefoundation.org/