Update webui.py

fix: newline in colab

fix: Colab Cuda version

fix: colab notebook

fix: Colab notebook by Hina

refactor: Add no webui colab link

fix: Install sox for colab notebook

feat: Audio output format options

refactor: Include sox installation instructions in readme

refactor: Update readme

feat: Update instructions for new changes and fixes

feat: Pitch change for bgm and vocals together

feat: Pitch detection algorithm option for mangio-crepe

fix: Add file size checks for model download

refactor: Use mp3 format instead of webm for youtube links