Update README.md

Author: jsphchoi

README.md

@@ -4,7 +4,9 @@
 
 | **PSOR Lab** | **Documentation**                                                 | **Build Status**                                                                                |
 |:------------:|:-----------------------------------------------------------------:|:-----------------------------------------------------------------------------------------------:|
-| [![](https://img.shields.io/badge/Developed_by-PSOR_Lab-342674)](https://psor.uconn.edu/) | [![Stable](https://img.shields.io/badge/docs-stable-blue.svg)](https://PSORLab.github.io/EOptInterface.jl/stable/) [![Dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://PSORLab.github.io/EOptInterface.jl/dev/) | [![Build Status](https://github.com/PSORLab/EOptInterface.jl/workflows/CI/badge.svg?branch=main)](https://github.com/PSORLab/EOptInterface.jl/actions?query=workflow%3ACI) [![codecov](https://codecov.io/gh/PSORLab/EOptInterface.jl/branch/main/graph/badge.svg)](https://codecov.io/gh/PSORLab/EOptInterface.jl) |
+| [![](https://img.shields.io/badge/Developed_by-PSOR_Lab-342674)](https://psor.uconn.edu/) | [![Stable](https://img.shields.io/badge/docs-stable-blue.svg)](https://PSORLab.github.io/EOptInterface.jl/stable/) [![Dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://PSORLab.github.io/EOptInterface.jl/dev/) | [![Build Status](https://github.com/PSORLab/EOptInterface.jl/workflows/CI/badge.svg?branch=main)](https://github.com/PSORLab/EOptInterface.jl/actions?query=workflow%3ACI) [![codecov](https://codecov.io/gh/PSORLab/EOptInterface.jl/graph/badge.svg?token=1x9pOV439N)](https://codecov.io/gh/PSORLab/EOptInterface.jl) |
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@@ -276,3 +278,4 @@ JuMP.optimize!(model)
 
 
 
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