docs: add doi badge to readme

Author: korikuzma

README.md

@@ -2,7 +2,7 @@
 Cool-Seq-Tool
 </h1>
 
-[![image](https://img.shields.io/pypi/v/cool-seq-tool.svg)](https://pypi.python.org/pypi/cool-seq-tool) [![image](https://img.shields.io/pypi/l/cool-seq-tool.svg)](https://pypi.python.org/pypi/cool-seq-tool) [![image](https://img.shields.io/pypi/pyversions/cool-seq-tool.svg)](https://pypi.python.org/pypi/cool-seq-tool) [![Actions status](https://github.com/genomicmedlab/cool-seq-tool/actions/workflows/checks.yaml/badge.svg)](https://github.com/genomicmedlab/cool-seq-tool/actions/checks.yaml)
+[![image](https://img.shields.io/pypi/v/cool-seq-tool.svg)](https://pypi.python.org/pypi/cool-seq-tool) [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.14007783.svg)](https://doi.org/10.5281/zenodo.14007783) [![image](https://img.shields.io/pypi/l/cool-seq-tool.svg)](https://pypi.python.org/pypi/cool-seq-tool) [![image](https://img.shields.io/pypi/pyversions/cool-seq-tool.svg)](https://pypi.python.org/pypi/cool-seq-tool) [![Actions status](https://github.com/genomicmedlab/cool-seq-tool/actions/workflows/checks.yaml/badge.svg)](https://github.com/genomicmedlab/cool-seq-tool/actions/checks.yaml)
 
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