Typo in the blog article: `3 Proven Ways To Test Your Flask Applications With Pytest`

Hi Eric, I'm regularly reading your amazing testing tutorials, and I found a typo in `3 Proven Ways To Test Your Flask Applications With Pytest`

Section: [Use-a-Real-Test-DB](https://pytest-with-eric.com/api-testing/pytest-flask-postgresql-testing/#Use-a-Real-Test-DB)

> The test accepts a Test FlastAPI client and user_payload as fixtures.