Use Python 3.9 for tag_and_publish workflow

.github/workflows/tag_and_publish.yml

@@ -16,10 +16,10 @@ jobs:
         ref: ${{ env.DEFAULT_BRANCH }}
         fetch-depth: 0
         token: ${{ secrets.SERVICE_TOKEN }}
-    - name: Set up Python 3.8
+    - name: Set up Python 3.9
       uses: actions/setup-python@v3
       with:
-        python-version: 3.8
+        python-version: 3.9
     - name: Install dependencies
       run: | 
         python -m pip install -e .[dev] --no-cache-dir
@@ -74,10 +74,10 @@ jobs:
       - uses: actions/checkout@v3
       - name: Pull latest changes
         run: git pull origin main
-      - name: Set up Python 3.8
+      - name: Set up Python 3.9
         uses: actions/setup-python@v2
         with:
-          python-version: 3.8
+          python-version: 3.9
       - name: Install dependencies
         run: |
           pip install --upgrade setuptools wheel twine build