Correct example in lib.rs

src/lib.rs

@@ -13,7 +13,8 @@
 //! let mut rt = tokio::runtime::Runtime::new().unwrap();
 //! let url = ("https://hyper.rs").parse().unwrap();
 //! let https = hyper_rustls::HttpsConnectorBuilder::new()
-//!     .with_native_roots()?
+//!     .with_native_roots()
+//!     .expect("no native root CA certificates found")
 //!     .https_only()
 //!     .enable_http1()
 //!     .build();