bpo-45772: socket.socket should be a class instead of a function

Currently `socket.socket` is documented as a function, but it is really
a class (and thus has function-like usage to construct an object). This
correction would ensure that Python projects that are interlinking
Python's documentation can properly locate `socket.socket` as a type.

Doc/library/socket.rst

@@ -562,7 +562,7 @@ Creating sockets
 The following functions all create :ref:`socket objects <socket-objects>`.
 
 
-.. function:: socket(family=AF_INET, type=SOCK_STREAM, proto=0, fileno=None)
+.. class:: socket(family=AF_INET, type=SOCK_STREAM, proto=0, fileno=None)
 
    Create a new socket using the given address family, socket type and protocol
    number.  The address family should be :const:`AF_INET` (the default),

Misc/NEWS.d/next/Documentation/2021-11-09-13-10-55.bpo-45772.EdrM3t.rst

@@ -0,0 +1 @@
+``socket.socket`` is corrected to a class from a function.