Lataa Audacity 3.7.4

This is a patch release. It contains the following changes:
- Added a new welcome/what's new screen.
- OpenVINO effects are now available on macOS. More about that can be found in this blogpost.
- OpenVINO effects can now be found via the Get Effects button. (NB, this is a slow rollout - you may not see it there just yet at the time of release)
- OpenVINO effects have been recategorized into their own category in the Effect menu. This also goes for the transcription and music generator feature, previously found in the Generate and Analyze menus, respectively.
- #6890 Fixed a crash when closing a large unsaved project
- #8709 Fixed a crash when using real-time effects that activate delay compensation
- #8494 Fixed issue where Studio Fade Out creates a new clip when applied at the end of a clip
- #8442 Fixed incorrect waveform rendering on clipped audio
- #8559 Fixed unintended deletion of a clip when joining two clips with pitch adjustment
- #3003 Effect preview now works when the track is muted
- #8666 Fixed possible incorrect calculations in the Hamming window derivative (Thanks, @witwald!)
- #8577 Fixed compilation issues on legacy macOS (Thanks, @barracuda156!)