Move pip install outside setup-python action

Author: rffontenelle

.github/workflows/sync.yml

@@ -144,7 +144,11 @@ jobs:
           python-version: ${{ inputs.version }}
           allow-prereleases: true
           cache: 'pip'
-          pip-install: -r requirements.txt
+
+      - name: Install Python packages
+        run: |
+          python -m pip install -U pip
+          python -m pip install -r requirements.txt
 
       # 2- Remove PO files and the download files (excluding obsolete)