Bump certifi from 2023.5.7 to 2023.7.22 in /app (#183)

Bumps [certifi](https://github.com/certifi/python-certifi) from 2023.5.7
to 2023.7.22 to fix high severity dependabot alert: https://github.com/navapbc/template-application-flask/security/dependabot/14

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>