Update Doc/library/socket.rst

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>

Author: Rosuav

Doc/library/socket.rst

@@ -482,7 +482,7 @@ The AF_* and SOCK_* constants are now :class:`AddressFamily` and
    .. versionchanged:: 3.14
       Added support for ``TCP_QUICKACK`` on Windows platforms when available.
 
-   .. versionchanged:: 3.15
+   .. versionchanged:: next
       ``IPV6_HDRINCL`` was added.