[docs] Correct typos in SSLContext.sni_callback (GH-30623) (GH-31421)

Co-authored-by: Jörn Heissler <nosuchaddress@joern-heissler.de>
(cherry picked from commit f80a97b492f41afd3c42bb2bd6da7b2828dca215)

Co-authored-by: Jörn Heissler <joernheissler@users.noreply.github.com>
diff --git a/Doc/library/ssl.rst b/Doc/library/ssl.rst
index a20f97a..3531cc3 100644
--- a/Doc/library/ssl.rst
+++ b/Doc/library/ssl.rst
@@ -1753,10 +1753,10 @@
    Due to the early negotiation phase of the TLS connection, only limited
    methods and attributes are usable like
    :meth:`SSLSocket.selected_alpn_protocol` and :attr:`SSLSocket.context`.
-   :meth:`SSLSocket.getpeercert`, :meth:`SSLSocket.getpeercert`,
-   :meth:`SSLSocket.cipher` and :meth:`SSLSocket.compress` methods require that
+   The :meth:`SSLSocket.getpeercert`,
+   :meth:`SSLSocket.cipher` and :meth:`SSLSocket.compression` methods require that
    the TLS connection has progressed beyond the TLS Client Hello and therefore
-   will not contain return meaningful values nor can they be called safely.
+   will not return meaningful values nor can they be called safely.
 
    The *sni_callback* function must return ``None`` to allow the
    TLS negotiation to continue.  If a TLS failure is required, a constant