README.md in scs-0.3.2

- old
+ new
@@ -1,12 +1,13 @@
 <h1 align="center" margin=0px>
 <img src="https://github.com/cvxgrp/scs/blob/master/docs/src/_static/scs_logo.png" alt="Intersection of a cone and a polyhedron" width="450">
 </h1>
 
 [![Build Status](https://github.com/cvxgrp/scs/actions/workflows/build.yml/badge.svg)](https://github.com/cvxgrp/scs/actions/workflows/build.yml)
+[![Documentation](https://img.shields.io/badge/docs-online-brightgreen?logo=read-the-docs&style=flat)](https://www.cvxgrp.org/scs/)
 [![Coverage Status](https://coveralls.io/repos/github/cvxgrp/scs/badge.svg?branch=master)](https://coveralls.io/github/cvxgrp/scs?branch=master)
 
 
 SCS (`splitting conic solver`) is a numerical optimization package for solving
-large-scale convex cone problems. The current version is `3.0.0`.
+large-scale convex cone problems. The current version is `3.1.1`.
 
 The full documentation is available [here](https://www.cvxgrp.org/scs/).