chore(deps): update cryptography requirement in /api

Updates the requirements on [cryptography](https://github.com/pyca/cryptography) to permit the latest version.
- [Changelog](https://github.com/pyca/cryptography/blob/main/CHANGELOG.rst)
- [Commits](pyca/cryptography@42.0.8...43.0.0)

---
updated-dependencies:
- dependency-name: cryptography
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

api/requirements.txt

@@ -1,7 +1,7 @@
 captcha~=0.5.0
 celery~=5.4.0
 coverage~=7.5.4
-cryptography~=42.0.8
+cryptography~=43.0.0
 Django~=5.0.6
 django-cors-headers~=4.4.0
 djangorestframework~=3.14.0