Update README

README.md

@@ -29,3 +29,11 @@ A complete list of error messages can found in [ERRORS.md](ERRORS.md)
 pip install pytest
 pytest --doctest-modules
 ```
+
+## Release a new version
+
+- Update version in [setup.py](setup.py) and [CHANGELOG.md](CHANGELOG.md) files
+- Commit changes using `Release` as commit message
+- Create git tag (starting with "v" for the release)
+- Git push: `git push && git push --tagss`
+- Check that pypi package is created ([validata-core pipelines](https://git.opendatafrance.net/validata/validata-core/-/pipelines))