fix: Brought win speechSynthesis up-to-speed (#14070)
fix: Brought win speechSynthesis up-to-speed (#14070)

The implementation was brought up-to-speed with Chromium 70.0.3522.1 (https://chromium.googlesource.com/chromium/src.git/+/70.0.3522.1/chrome/browser/speech/tts_win.cc).

This to solve issues with Windows not returning voices (#11585).
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