Mimic 3 voices don't pause at em dashes

[fivestones]

Describe the bug Mimic 3 doesn't pause when it encounters an em dash in the text. An em dash is "—", different from a hyphen ("-")

To Reproduce Steps to reproduce the behavior: Create text that includes an em dash ("—") such as "Today—not tomorrow—is the day we have been waiting for" Perform a TTS job with this text The resulting speech does not pause at the location of the em dashes.

Expected behavior There should be a small pause at an em dash, similar to a comma

Environment (please complete the following information):

• Device type: Raspberry Pi 4
• OS: Raspberry Pi Os, linux kernel 5.10.103-v8+
• Mycroft-core version: latest docker version (mycroftai/mimic3)
• Other versions:

Additional context I'm only working in english, noticed this with the en_US/vctk_low#p276 voice but I think it's present in any voices I've tried.

Thanks!