Update README.md

Author: stevejpurves

README.md

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 # Thebe: Integrate Jupyter based computation into web apps and static web pages
 
-![test](https://github.com/jupyter-book/thebe/workflows/test/badge.svg)
 [![launch badge](https://img.shields.io/badge/launch-thebe-orange)](https://jupyter-book.github.io/thebe)
 
 > **Note**: This readme has been updated for the 0.9.0 release