action: add missing '' to python version

Signed-off-by: Heiko Thiery <[email protected]>

Author: hthiery

.github/workflows/publish.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Set up Python 3.10
         uses: actions/setup-python@v4
         with:
-          python-version: 3.10
+          python-version: '3.10'
       - name: Install pypa/build
         run: >-
           python -m