Add NEWS file

Author: gvanrossum-ms

Misc/NEWS.d/next/Library/2026-03-11-10-25-32.gh-issue-123720.TauFRx.rst

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+asyncio: Fix :func:`asyncio.Server.serve_forever` shutdown regression. Since
+3.12, cancelling `serve_forever()` could hang waiting for a handler blocked
+on a read from a client that never closed (effectively requiring two
+interrupts to stop); the shutdown sequence now ensures client streams are
+closed so `serve_forever()` exits promptly and handlers observe EOF.