test: portable python fork

see actions/python-versions#275

Author: remdub

plone-package-test-notify/action.yml

@@ -48,7 +48,7 @@ runs:
         key: ${{ inputs.CACHE_KEY }}
     - name: Setup Python
       if: ${{ inputs.PYTHON_VERSION != '' }}
-      uses: actions/setup-python@v5.5.0
+      uses: jaswanthikolla/setup-python@portable_python
       with:
         python-version: ${{ inputs.PYTHON_VERSION }}
     - name: Install dependencies