🐛 Bug - Change default user account when creating a PR

[jeoffreyfischer]

Describe the issue that you're seeing. Any Loom videos or screenshots usually help a lot!

When a user creates a new PR using TinaCMS, it shows that it was created by tina-cloud-app.
This is a problem as the PR must be linked to their author in order to have a proper history.

Figure: When creating a PR, the default account that's used is tina-cloud-app.

Reproduction

N/A as this bug is found in every new PR

Steps to reproduce

1. Navigate to any editable page
2. Make a change to the page
3. Save the change
4. Create a new PR
5. See that the new PR reads created by "tina-cloud-app"

System Info

Windows 11, Chrome

Validations

• Follow our Code of Conduct
• Read the docs.
• Check that there isn't already an issue that reports the same bug.

[kldavis4]

See https://tina.io/docs/tina-cloud/faq/#enabling-co-author-on-git-commits

Make this change would cause issues with Vercel (see https://vercel.com/docs/deployments/git#deploying-private-git-repositories)