Update design.md

src/connection_handler.hpp

@@ -40,8 +40,8 @@ public:
    * - Return appropriate ProcessResult for connection management
    * - Handle partial messages and streaming protocols appropriately
    * - Can take ownership by calling conn_ptr.release() to pass to other threads
-   * - If ownership is taken, handler must call conn->releaseBackToServer() when
-   * done
+   * - If ownership is taken, handler must call Server::releaseBackToServer()
+   * when done
    */
   virtual ProcessResult process_data(std::string_view data,
                                      std::unique_ptr<Connection> &conn_ptr) = 0;