security: pin urllib3>=2.6.0 to fix CVE-2024-37891

Author: Bentlybro

requirements.txt

@@ -16,6 +16,7 @@ httpx[http2]
 bcrypt==5.0.0
 python-dotenv==1.2.1
 requests==2.32.5
+urllib3>=2.6.0  # Security fix for CVE-2024-37891
 pre-commit==4.5.1
 pydantic==2.12.5
 Flask-Talisman==1.1.0