Merge pull request optuna#841 from c-bata/fix-pypi-publish-action

Fix pypi-publish action

.github/workflows/pypi-publish.yml

@@ -28,7 +28,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip setuptools
-        pip install --progress-bar off wheel twine
+        pip install --progress-bar off wheel twine build
     - run: python -m build --sdist --wheel
 
     - name: Publish distribution to PyPI