GH-88342: clarify that asyncio.as_completed accepts generators yielding tasks (#103626)

Author: kumaraditya303

Doc/library/asyncio-task.rst

@@ -829,6 +829,9 @@ Waiting Primitives
       Deprecation warning is emitted if not all awaitable objects in the *aws*
       iterable are Future-like objects and there is no running event loop.
 
+   .. versionchanged:: 3.12
+      Added support for generators yielding tasks.
+
 
 Running in Threads
 ==================

Doc/whatsnew/3.12.rst

@@ -250,7 +250,8 @@ asyncio
   :mod:`asyncio` does not support legacy generator-based coroutines.
   (Contributed by Kumar Aditya in :gh:`102748`.)
 
-* :func:`asyncio.wait` now accepts generators yielding tasks.
+* :func:`asyncio.wait` and :func:`asyncio.as_completed` now accepts generators
+  yielding tasks.
   (Contributed by Kumar Aditya in :gh:`78530`.)
 
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