Update MODEL_CARD.md

[wasertech]

Same here

Pull request guidelines

Welcome to the 🐸STT-models project! We are excited to see your interest, and we appreciate your support!

This repository is governed by the Contributor Covenant Code of Conduct. For more details, see the CODE_OF_CONDUCT.md file.

Before accepting your pull request, you will be asked to sign a Contributor License Agreement.

This Contributor License Agreement:

• Protects you, Coqui, and the users of the code.
• Does not change your rights to use your contributions for any purpose.
• Does not change the license of the 🐸STT-models project. It just makes the terms of your contribution clearer and lets us know you are OK to contribute.