Use site factory

[felipeelia]

Description of the Change

Closes #3828

How to test the Change

Changelog Entry

Fixed - Unit test related to blog creation

Credits

Props @felipeelia @burhandodhy

Checklist:

• [ ] I agree to follow this project's Code of Conduct.
• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my change.
• [ ] All new and existing tests pass.