ssl docs: Fix typo (GH-32336)

Author: fmoor

Doc/library/ssl.rst

@@ -1548,7 +1548,7 @@ to speed up repeated connections from the same clients.
    string must be the path to a single file in PEM format containing the
    certificate as well as any number of CA certificates needed to establish
    the certificate's authenticity.  The *keyfile* string, if present, must
-   point to a file containing the private key in.  Otherwise the private
+   point to a file containing the private key.  Otherwise the private
    key will be taken from *certfile* as well.  See the discussion of
    :ref:`ssl-certificates` for more information on how the certificate
    is stored in the *certfile*.