[3.11] Add a mention of PYTHONBREAKPOINT to breakpoint() docs (GH-104430) (#104447)

Add a mention of PYTHONBREAKPOINT to breakpoint() docs (GH-104430)
(cherry picked from commit 1be80ed107)

Co-authored-by: Ned Batchelder <ned@nedbatchelder.com>
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Miss Islington (bot) 2023-05-13 00:16:28 -07:00 committed by GitHub
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@ -168,6 +168,13 @@ are always available. They are listed here in alphabetical order.
If :func:`sys.breakpointhook` is not accessible, this function will
raise :exc:`RuntimeError`.
By default, the behavior of :func:`breakpoint` can be changed with
the :envvar:`PYTHONBREAKPOINT` environment variable.
See :func:`sys.breakpointhook` for usage details.
Note that this is not guaranteed if :func:`sys.breakpointhook`
has been replaced.
.. audit-event:: builtins.breakpoint breakpointhook breakpoint
.. versionadded:: 3.7