bpo-43215: Document Happy Eyeballs args of asyncio.open_connection (pythonGH-24525)

Co-authored-by: Andrew Svetlov <andrew.svetlov@gmail.com>

Author: illia-v

Doc/library/asyncio-stream.rst

@@ -51,7 +51,8 @@ and work with streams:
 .. coroutinefunction:: open_connection(host=None, port=None, *, \
                           limit=None, ssl=None, family=0, proto=0, \
                           flags=0, sock=None, local_addr=None, \
-                          server_hostname=None, ssl_handshake_timeout=None)
+                          server_hostname=None, ssl_handshake_timeout=None, \
+                          happy_eyeballs_delay=None, interleave=None)
 
    Establish a network connection and return a pair of
    ``(reader, writer)`` objects.
@@ -69,6 +70,9 @@ and work with streams:
    .. versionchanged:: 3.7
       Added the *ssl_handshake_timeout* parameter.
 
+   .. versionadded:: 3.8
+      Added *happy_eyeballs_delay* and *interleave* parameters.
+
    .. versionchanged:: 3.10
       Removed the *loop* parameter.