ensure rustls is used when feature is activated

Author: GustavoWidman

src/v1/api.rs

@@ -136,6 +136,9 @@ impl OpenAIClient {
         let url = format!("{}/{}", self.api_endpoint, path);
         let client = Client::builder();
 
+        #[cfg(feature = "rustls")]
+        let client = client.use_rustls_tls();
+
         let client = if let Some(timeout) = self.timeout {
             client.timeout(std::time::Duration::from_secs(timeout))
         } else {