Use pip-install from setup-python

Author: rffontenelle

.github/workflows/sync.yml

@@ -47,7 +47,7 @@ jobs:
           python-version: ${{ inputs.version }}
           allow-prereleases: true
           cache: 'pip'
-          cache-dependency-path: requirements.txt
+          pip-install: -r requirements.txt
 
       # 2- Install dependencies
 
@@ -59,10 +59,6 @@ jobs:
       - name: Install APT dependencies
         run: sudo apt update -y && sudo apt install gettext -y
 
-      - name: Install Python dependencies
-        run: |
-          pip install -r requirements.txt
-
       # 3- Pull translations
 
       - name: Generate updated .tx/config