Update the URL for the requests package (GH-17006)


Change the url from docs.python-requests.org to requests.readthedocs.io
(cherry picked from commit 112f2b805bc83429e8a66a54d088bbefc921abb7)

Co-authored-by: Simon Legner <Simon.Legner@gmail.com>
diff --git a/Doc/library/http.client.rst b/Doc/library/http.client.rst
index db26d56..9cdabc2 100644
--- a/Doc/library/http.client.rst
+++ b/Doc/library/http.client.rst
@@ -20,7 +20,7 @@
 
 .. seealso::
 
-    The `Requests package <http://docs.python-requests.org/>`_
+    The `Requests package <https://requests.readthedocs.io/en/master/>`_
     is recommended for a higher-level HTTP client interface.
 
 .. note::