👷 Fix publish with Poetry in CI

There's an still open issue where Poetry doesn't properly reads the env
variable to get the PyPi token:
python-poetry/poetry#2210

.gitlab-ci.yml

@@ -232,6 +232,7 @@ publish test:
 publish:
   stage: publish
   script:
+    - poetry config pypi-token.pypi "$POETRY_PYPI_TOKEN_PYPI"
     - poetry publish --build
     - sha256sum dist/*
     - sha512sum dist/*