Update Misc/NEWS.d/next/Security/2026-09-23-11-34-30.gh-issue-156793.zC_AjF.rst

Author: Yhg1s

Misc/NEWS.d/next/Security/2026-09-23-11-34-30.gh-issue-156793.zC_AjF.rst

@@ -1,4 +1,6 @@
 :mod:`asyncio`: :meth:`loop.start_tls() <asyncio.loop.start_tls>` and
 :meth:`loop.create_connection() <asyncio.loop.create_connection>` now
 validate the *server_hostname* argument if an :class:`ssl.SSLContext` is
-passed with *check_hostname* set to ``True``.
+passed with *check_hostname* set to ``True``, emitting
+:exc:`DeprecationWarning` if *server_hostname* is missing. (This will raise
+:exc:`ValueError` in Python 3.13 and later.)