Update README.md with zenodo link

Author: jprestop

README.md

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 # FastEddy® 
 ©2016 University Corporation for Atmospheric Research
 
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.11042754.svg)](https://doi.org/10.5281/zenodo.11042754)
+
 # Open-source License 
 The FastEddy® model is licensed under the Apache License, Version 2.0 (the "License");
 you may not use any source code in this repository except in compliance with the License.