Update repo URLs (#370)

src/proto/streams/streams.rs

@@ -577,7 +577,7 @@ where
         // prioritize layer. If prioritization reorders new streams, this
         // implicitly closes the earlier stream IDs.
         //
-        // See: carllerche/h2#11
+        // See: hyperium/h2#11
         let mut me = self.inner.lock().unwrap();
         let me = &mut *me;