py-pydicom: updated to 2.4.3

Version 2.4.3

Fixes
-----

* Fixed pydicom codify error when relative path did not exist

Version 2.4.0

Changes
-------
* Removed support for Python 3.6 (EOL since December 2021)

Enhancements
------------
* Added attribute :attr:`~pydicom.valuerep.PersonName.alphabetic` (:pr:`1634`)
* Added attribute :attr:`~pydicom.tag.BaseTag.json_key` (:pr:`1648`)
* Added value validation for numerical VRs, add type validation for all
  validated VRs (:issue:`1414`)
* CLI commands now accept *pydicom* charset test files and CLI help shows
  Python Version (:pr:`1674`)
* Added support for Python 3.11 (:issue:`1658`)
* Added :class:`~pydicom.valuerep.ISfloat` to allow non-strict reading of
  existing files with float IS values (:issue:`1661`)
* Improved speed of creating and accessing highly nested structures
  (:issue:`1728`, :pr:`1734`)
* Switched to a pyproject.toml build process (:pr:`1792`)
* Updated DICOM and UID dicts to DICOM 2023b (:pr:`1803`)

Fixes
-----
* Fixed length validation of DS values with maximum length without a leading
  zero (:issue:`1632`)
* Increased download speed with progress bar for test data (:issue:`1611`)
* Fixed crash due to invalid private creator (:issue:`1638`)
* Fixed extremely long BytesLengthException error messages (:pr:`1683`)
* In codify, ensure unique variable names for DICOM keywords repeated
  in sequences, and handle unicode characters correctly (:issue:`1670`)
* Fixed handling of some invalid values in
  :meth:`~pydicom.dataset.Dataset.to_json_dict` if `suppress_invalid_tags` is
  set to `True` (:issue:`1693`)
* Fixed reading of data with 8 bits allocated, encoded in Big Endian transfer
  syntax using VR ``OW`` (:issue:`1680`)
* Fixed crash if reading regular dataset that has the SOP Class of a DICOMDIR
  (:issue:`1702`)
* Fixed wrong waveform data calculation when as_raw=False and baseline!=0 (:issue:`1667`)
* Fixed reading LUTData to expected size (:pr:`1747`)
* Fixed handling of AT VRs when codifying data elements (:issue:`1738`)

Pydicom Internals
-----------------
* In test suites, renamed 'setup' and 'teardown' methods, deprecated starting
  in pytest 7.2
* Use own fork of `CharPyLS` to handle builds with Python 3.11 (:issue:`1788`)

(adam)