update readme

README.md

@@ -3,10 +3,9 @@
 [![main - CI](https://github.com/NREL-Sienna/Sienna-PACKAGE.jl/workflows/main%20-%20CI/badge.svg)](https://github.com/NREL-Sienna/Sienna-PACKAGE.jl/actions/workflows/main-tests.yml)
 [![codecov](https://codecov.io/gh/NREL-Sienna/Sienna-PACKAGE.jl/branch/main/graph/badge.svg)](https://codecov.io/gh/NREL-SIENNA/SIENNA-PACKAGE.jl)
 [![Documentation Build](https://github.com/NREL-Sienna/Sienna-PACKAGE.jl/workflows/Documentation/badge.svg?)](https://nrel-sienna.github.io/Sienna-PACKAGE.jl/stable)
-[<img src="https://img.shields.io/badge/slack-@Sienna/SiennaPACKAGE-sienna.svg?logo=slack">](https://join.slack.com/t/nrel-siip/shared_invite/zt-glam9vdu-o8A9TwZTZqqNTKHa7q3BpQ)
+[<img src="https://img.shields.io/badge/slack-@Sienna/SiennaPACKAGE-sienna.svg?logo=slack">](https://join.slack.com/t/nrel-sienna/shared_invite/zt-glam9vdu-o8A9TwZTZqqNTKHa7q3BpQ)
 [![Sienna-PACKAGE.jl Downloads](https://shields.io/endpoint?url=https://pkgs.genieframework.com/api/v1/badge/SIENNA-PACKAGE)](https://pkgs.genieframework.com?packages=Sienna-PACKAGE)
 
-
 This repository contains the template files for a dummy package called SIENNA-PACKAGE. IT contains the required files for
 
 - Testing