build(deps): bump cryptography from 40.0.2 to 43.0.1 in /backend

Bumps [cryptography](https://github.com/pyca/cryptography) from 40.0.2 to 43.0.1.
- [Changelog](https://github.com/pyca/cryptography/blob/main/CHANGELOG.rst)
- [Commits](pyca/cryptography@40.0.2...43.0.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

backend/poetry.lock

@@ -12,7 +12,7 @@ fastapi = "0.105.0"
 uvicorn = {extras = ["standard"], version = "^0.21.1"}
 psycopg2-binary = "^2.9.9"
 pymysql = "^1.1.1"
-cryptography = "^40.0.2"
+cryptography = "^43.0.1"
 sqlalchemy = {extras = ["asyncio"], version = "^2.0.27"}
 rapidfuzz = "^3.0.0"
 psycopg = {extras = ["pool"], version = "^3.1.9"}