fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-CRYPTOGRAPHY-7886970

requirements.txt

@@ -1,6 +1,6 @@
 bcrypt==3.2.0
 blinker==1.6.2
-cryptography==42.0.2
+cryptography==43.0.1
 Flask==2.2.5
 Flask-Compress==1.10.1
 Flask-Cors==3.0.10