quickstart broken link

[frafra]

https://github.com/pallets-eco/flask-debugtoolbar/blob/e3c8ab0ca28d7ddfaaa731ef1e15649182255c6a/src/flask_debugtoolbar/templates/panels/sqlalchemy_error.html#L23

Should be replaced with https://flask-sqlalchemy.palletsprojects.com/en/latest/quickstart/, I guess.