Fix sounddevice version requirement and update notebook

- Change sounddevice requirement from >=0.5.2 to >=0.5.1 to fix installation issues (version 0.5.2 doesn't exist)
- Update sentence-by-sentence streaming cell to use mp3_44100_128 format instead of pcm_44100 (free tier compatible)
- Add pip upgrade cell to notebook for better package management
- Clean up notebook cell execution outputs

Co-Authored-By: ashprabaker <[email protected]>

Author: nadine-anthropic