Update setup.py

[synkarius]

Description

Remove my old email from setup.py. The replacement, "caster@donottrackplus.com", forwards to my new email. Ideally, this should be changed to be Dictation Toolbox's email, or that of a current maintainer.

Motivation and Context

This old email is now incorrect.

Checklist

• [ ] I have read the CONTRIBUTING document.
• [x] My code follows the code style of this project.
• [ ] I have checked that my code does not duplicate functionality elsewhere in Caster.
• [ ] My code implements all the features I wish to merge in this pull request.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests pass.

[LexiconCode]

It could be updated to CasterVoice@protonmail.com

[synkarius]

Sounds good. Updated.