Move pip install outside setup-python action

Author: rffontenelle

.github/workflows/sync.yml

@@ -46,7 +46,6 @@ jobs:
           python-version: ${{ inputs.version }}
           allow-prereleases: true
           cache: 'pip'
-          pip-install: -r requirements.txt
 
       # 2- Install dependencies
 
@@ -55,6 +54,11 @@ jobs:
           cd /usr/local/bin
           curl -o- https://raw.githubusercontent.com/transifex/cli/master/install.sh | bash -s -- v$TX_CLI_VERSION
 
+      - name: Install Python packages
+        run:
+          python -m pip install -U pip
+          python -m pip install -r requirements.txt
+
       - name: Install APT dependencies
         run: sudo apt update -y && sudo apt install gettext -y