Add NEWS entry for asyncio nested KeyboardInterrupt fix

Author: okiemute04

Misc/NEWS.d/next/Library/2026-03-20-05-10-21.gh-issue-146194.aXjDnd.rst

@@ -0,0 +1,4 @@
+Fix nested :exc:`KeyboardInterrupt` handling in :mod:`asyncio`. Previously,
+multiple Ctrl+C presses would cause a crash with ``Task was destroyed but it
+is pending!``. Now nested cancellations propagate correctly through multiple
+levels.