py-ipython: updated to 8.16.0

IPython 8.16
------------

Small double release of IPython (with the 8.12.3 release notes just below).
Mostly bug fixes and cleanups, and type annotations. Of interest for users:

- Fix a bug of the new iPdb chained traceback where some
  Exception would not have any traceback. (see upstream fix in CPython for more
  details).
- Fix an error where semicolon would not suppress output.
- Fix case with spurious message about event loops when using
  matplotlib.

(adam)