fix pylint

Author: idbentley

src/clerk_backend_api/jwks_helpers/authenticaterequest.py

@@ -94,9 +94,9 @@ def get_session_token(request: Requestish) -> Optional[str]:
         if cookie_header is not None:
             if cookie_header is not None:
                 cookies = SimpleCookie(cookie_header)
-                for key in cookies.keys():
+                for key, value in cookies.items():
                     if key.startswith("__session"):
-                        return cookies[key].value
+                        return value.value
 
         return None