Update README.rst

Author: sgillies

README.rst

@@ -4,7 +4,7 @@ Planet API Client
 
 Python client library and CLI for Planet's public API.
 
-.. image:: https://github.com/planet/planet-client-python/actions/workflows/tests.yaml/badge.svg?branch=master
+.. image:: https://github.com/planetlabs/planet-client-python/actions/workflows/tests.yaml/badge.svg?branch=master
    :target: https://github.com/planetlabs/planet-client-python/actions
    :alt: CI for v1