Bump pypa/gh-action-pypi-publish from 1.8.5 to 1.8.6 (#2697)

Bumps [pypa/gh-action-pypi-publish](https://github.com/pypa/gh-action-pypi-publish) from 1.8.5 to 1.8.6.
- [Release notes](https://github.com/pypa/gh-action-pypi-publish/releases)
- [Commits](pypa/gh-action-pypi-publish@v1.8.5...v1.8.6)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/2_auto_publish_release.yml

@@ -39,7 +39,7 @@ jobs:
       uses: cylc/release-actions/build-python-package@v1
 
     - name: Publish distribution to PyPI
-      uses: pypa/[email protected].5
+      uses: pypa/[email protected].6
       with:
         user: __token__ # uses the API token feature of PyPI - least permissions possible
         password: ${{ secrets.PYPI_TOKEN }}