Merge pull request #142 from SCAI-BIO/patch/readme

Update README.md

Author: tiadams

README.md

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 # datastew
 
-![tests](https://github.com/SCAI-BIO/datastew/actions/workflows/tests.yml/badge.svg) ![GitHub Release](https://img.shields.io/github/v/release/SCAI-BIO/datastew)
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+[![DOI](https://zenodo.org/badge/822570156.svg)](https://doi.org/10.5281/zenodo.16871713) ![tests](https://github.com/SCAI-BIO/datastew/actions/workflows/tests.yml/badge.svg) ![GitHub Release](https://img.shields.io/github/v/release/SCAI-BIO/datastew)
 
 Datastew is a python library for intelligent data harmonization using Large Language Model (LLM) vector embeddings.