updated readme

Author: dance858

README.md

@@ -1,6 +1,6 @@
 # CVXPY DNLP Differentiation Engine
 
-This repository contains a **C implementation of the differentiation engine used by CVXPY** for its extension to **Disciplined Nonlinear Programming** ([DNLP])(https://github.com/cvxgrp/DNLP).
+This repository contains a **C implementation of the differentiation engine used by CVXPY** for its extension to **Disciplined Nonlinear Programming** [(DNLP)](https://github.com/cvxgrp/DNLP).
 
 The library provides low-level routines for computing derivatives required by nonlinear programming problems. 
 The library is intended as a **backend component** and is not meant to be used directly by end users.