Document release process

Author: functionpointer

README.md

@@ -29,3 +29,11 @@ if __name__ == "__main__":
 ```
 
 See also src/main.py
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+Dev notes
+=========
+
+To make a new release, use GitHub website and draft a release manually.
+Make sure the version number in pyproject.toml matches the new tag.
+GitHub Actions will publish it to pypi.