fix github ci publish yml file to include python version (for building with) (#147)

Author: guyp-descope

.github/workflows/python-publish.yaml

@@ -17,6 +17,8 @@ jobs:
         uses: actions/checkout@v3
       - name: Setup
         uses: descope/.github/.github/actions/python/poetry/setup@main
+        with:
+          python-version: "3.8"
       - name: Autobump version
         run: |
           poetry version $(git describe --tags --abbrev=0)