fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-CRYPTOGRAPHY-7161587

requirements.txt

@@ -43,7 +43,7 @@ colored==1.4.4
     #   digitalmarketplace-developer-tools
 configobj==5.0.8
     # via -r requirements.in
-cryptography==39.0.1
+cryptography==42.0.8
     # via paramiko
 digitalmarketplace-developer-tools==1.0.2
     # via -r requirements.in