Setup Python

.github/workflows/self-smoke-test-action.yml

@@ -45,6 +45,10 @@ jobs:
       uses: actions/checkout@v3
       with:
         path: test
+    - name: Setup Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: 3.12
     - name: Install the packaging-related tools
       run: python3 -m pip install -r test/requirements/test.txt
     - name: Create the stub package importable directory