Setup Python and install script dependencies

Author: rvermeulen

.github/workflows/finalize-release.yml

@@ -35,6 +35,14 @@ jobs:
         uses: actions/checkout@v4
         with:
           ref: ${{ env.REF }}
+      
+      - name: Install Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.9"
+
+      - name: Install dependencies
+        run: pip install -r scripts/release/requirements.txt
 
       - name: Configure git
         run: |