Update README.md

Author: LucaMarconato

README.md

@@ -8,6 +8,7 @@
 [![documentation badge](https://readthedocs.org/projects/scverse-spatialdata/badge/?version=latest)](https://spatialdata.scverse.org/en/latest/)
 [![DOI](https://zenodo.org/badge/487366481.svg)](https://zenodo.org/badge/latestdoi/487366481)
 [![Downloads](https://static.pepy.tech/badge/spatialdata)](https://pepy.tech/project/spatialdata)
+[![Release](https://github.com/scverse/spatialdata/actions/workflows/release.yaml/badge.svg)](https://github.com/scverse/spatialdata/actions/workflows/release.yaml)
 
 SpatialData is a data framework that comprises a FAIR storage format and a collection of python libraries for performant access, alignment, and processing of uni- and multi-modal spatial omics datasets. This repository contains the core spatialdata library. See the links below to learn more about other packages in the SpatialData ecosystem.