Fix vulns: cryptography 42.0.4

[rocketnova]

Ticket

N/A

Changes

What was added, updated, or removed in this PR.

• Set minimum version for /app python dependency cryptography to address security vulns

Context for reviewers

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While working on #596, I realized that the app included with the template has a security vuln. Caught in https://github.com/navapbc/template-infra/pull/596/checks

Testing

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[rocketnova]

This is an upstream issue with aws-cli. They are tracking it in this issue: aws/aws-cli#8030