fix session arg is ignored with RequestsWebClient (#142)

Author: mark99i

pydantic_client/sync_client.py

@@ -36,7 +36,7 @@ def _request(self, request_info: RequestInfo) -> Any:
 
         request_params = self.before_request(request_params)
 
-        response = requests.request(**request_params, timeout=self.timeout)
+        response = self.session.request(**request_params, timeout=self.timeout)
         response.raise_for_status()
 
         if response_model is str: