chore(deps): update pypa/gh-action-pypi-publish digest to 15c56db

Author: renovate[bot]

.github/workflows/release-cd.yml

@@ -32,7 +32,7 @@ jobs:
       - name: Build package
         run: python -m build
       - name: Publish package
-        uses: pypa/gh-action-pypi-publish@f7600683efdcb7656dec5b29656edb7bc586e597
+        uses: pypa/gh-action-pypi-publish@15c56dba361d8335944d31a2ecd17d700fc7bcbc
         with:
           user: __token__
           password: ${{ secrets.TWINE_TOKEN }}