Update DOI badge

Author: simonvanlierde

README.md

@@ -3,7 +3,7 @@
 [![Version](https://img.shields.io/github/v/release/CMLPlatform/relab?include_prereleases&filter=v*)](CHANGELOG.md)
 [![License: AGPL-v3+](https://img.shields.io/badge/License-AGPL--v3+-rebeccapurple.svg)](LICENSE.md)
 [![Data License: ODbL](https://img.shields.io/badge/Data_License-ODbL-rebeccapurple.svg)](https://opendatacommons.org/licenses/odbl/)
-[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.16637742.svg)](https://doi.org/10.5281/zenodo.16637742)
+[![DOI](https://img.shields.io/badge/DOI-10.5281%2Fzenodo.16637742-blue.svg)](https://doi.org/10.5281/zenodo.16637742)
 [![Coverage](https://img.shields.io/codecov/c/github/CMLPlatform/relab)](https://codecov.io/gh/CMLPlatform/relab)
 [![FAIR checklist badge](https://fairsoftwarechecklist.net/badge.svg)](https://fairsoftwarechecklist.net/v0.2?f=31&a=32113&i=22322&r=123)
 [![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-2.1-4baaaa.svg)](.github/CODE_OF_CONDUCT.md)