fixup! Document that asyncio contains uvloop code

Reword `Doc/license.rst` file, as suggested in
#107536 (comment)

Co-authored-by: Adam Turner <[email protected]>

Author: aloisklink

Doc/license.rst

@@ -1045,7 +1045,9 @@ https://www.w3.org/TR/xml-c14n2-testcases/ and is distributed under the
 asyncio
 ----------
 
-The :mod:`asyncio` module contains the following notice::
+Parts of the :mod:`asyncio` module are incorporated from
+`uvloop 0.16 <https://github.com/MagicStack/uvloop/tree/v0.16.0>`_,
+which is distributed under the MIT license::
 
   Copyright (c) 2015-2021 MagicStack Inc.  http://magic.io