Bump pypa/gh-action-pypi-publish from 1.7.1 to 1.8.1

Bumps [pypa/gh-action-pypi-publish](https://github.com/pypa/gh-action-pypi-publish) from 1.7.1 to 1.8.1.
- [Release notes](https://github.com/pypa/gh-action-pypi-publish/releases)
- [Commits](pypa/gh-action-pypi-publish@v1.7.1...v1.8.1)

---
updated-dependencies:
- dependency-name: pypa/gh-action-pypi-publish
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -425,15 +425,15 @@ jobs:
         python setup.py sdist bdist_wheel
 
     - name: Publish to PyPI (Test)
-      uses: pypa/gh-action-pypi-publish@v1.7.1
+      uses: pypa/gh-action-pypi-publish@v1.8.1
       if: (github.event_name == 'release')
       with:
         user: __token__
         password: ${{ secrets.pypi_test_password }}
         repository_url: https://test.pypi.org/legacy/
 
     - name: Publish to PyPI
-      uses: pypa/gh-action-pypi-publish@v1.7.1
+      uses: pypa/gh-action-pypi-publish@v1.8.1
       if: (github.event_name == 'release')
       with:
         user: __token__