Update README.md

Author: jeffjennings

README.md

@@ -17,6 +17,7 @@ For developers, this repo also contains scripts and resources used across all tu
 - FITS-images [![Build notebook](https://github.com/astropy-learn/tutorial--FITS-images/actions/workflows/build.yml/badge.svg)](https://github.com/astropy-learn/tutorial--FITS-images/actions/workflows/build.yml)
 - FITS-tables [![Build notebook](https://github.com/astropy-learn/tutorial--FITS-tables/actions/workflows/build.yml/badge.svg)](https://github.com/astropy-learn/tutorial--FITS-tables/actions/workflows/build.yml)
 - gaia-galactic-orbits [![Build notebook](https://github.com/astropy-learn/tutorial--gaia-galactic-orbits/actions/workflows/build.yml/badge.svg)](https://github.com/astropy-learn/tutorial--gaia-galactic-orbits/actions/workflows/build.yml)
+- gaia-visualization [![Build notebook](https://github.com/astropy-learn/tutorial--gaia-visualization/actions/workflows/build.yml/badge.svg)](https://github.com/astropy-learn/tutorial--gaia-visualization/actions/workflows/build.yml)
 - plot-catalog [![Build notebook](https://github.com/astropy-learn/tutorial--plot-catalog/actions/workflows/build.yml/badge.svg)](https://github.com/astropy-learn/tutorial--plot-catalog/actions/workflows/build.yml)
 - position-velocity-diagrams [![Build notebook](https://github.com/astropy-learn/tutorial--position-velocity-diagrams/actions/workflows/build.yml/badge.svg)](https://github.com/astropy-learn/tutorial--position-velocity-diagrams/actions/workflows/build.yml)
 - quantities [![Build notebook](https://github.com/astropy-learn/tutorial--quantities/actions/workflows/build.yml/badge.svg)](https://github.com/astropy-learn/tutorial--quantities/actions/workflows/build.yml)