Add Zenodo DOI badge for v1.5.0

Author: wolski

README.md

@@ -1,6 +1,7 @@
 [![R-CMD-check-prolfqua](https://github.com/fgcz/prolfqua/actions/workflows/r.yaml/badge.svg)](https://github.com/fgcz/prolfqua/actions/workflows/r.yaml) ![ReleseeDownloads](https://img.shields.io/github/downloads/fgcz/prolfqua/total)
 [![codecov](https://codecov.io/gh/fgcz/prolfqua/branch/Modelling2R6/graph/badge.svg?token=NP7IPP323C)](https://codecov.io/gh/fgcz/prolfqua)
 [![bioRxiv](https://img.shields.io/badge/bioRxiv-10.1101%2F2022.06.07.494524-ligtgreen)](https://www.biorxiv.org/content/early/2022/06/09/2022.06.07.494524)
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.18775726.svg)](https://doi.org/10.5281/zenodo.18775726)
 
 <img src="man/figures/imgfile.png" width="200">