accelerate 0.29.3

v0.29.3: Patchfix

on Python PyPI

• Fixes issue with backend refactor not working on CPU-based distributed environments by @jiqing-feng: #2670
• Fixes issue where load_checkpoint_and_dispatch needs a strict argument
• by @SunMarc: #2641

Full Changelog: v0.29.2...v0.29.3