docs(readme): fix six url

dajsn · max-wittig · commit 0bc30f840c9c · 2019-07-21T21:10:36.000+02:00
six URL was pointing to 404
diff --git a/README.rst b/README.rst
@@ -32,7 +32,7 @@ Requirements
 python-gitlab depends on:
 
 * `python-requests <http://docs.python-requests.org/en/latest/>`_
-* `six <https://pythonhosted.org/six/>`_
+* `six <https://six.readthedocs.io/>`_
 
 Install with pip
 ----------------
