Fix reflection warning in Jetty tests

Author: weavejester

ring-jetty-adapter/test/ring/adapter/test/jetty.clj

@@ -816,7 +816,8 @@
                       (on-close [_ _ _ _])
                       wsp/PingListener
                       (on-ping [_ sock data]
-                        (swap! log conj [:ping (buf->str (.duplicate data))])
+                        (swap! log conj
+                               [:ping (buf->str (.duplicate ^ByteBuffer data))])
                         (ws/pong sock data)))})]
       (with-server handler {:port test-port}
         (let [ws @(hato/websocket test-websocket-url