test runner - fix v6

.forgejo/workflows/deploy.yml

@@ -39,16 +39,17 @@ jobs:
           git clone https://vicsergeev.ru/forgejo/Vic/DummyApp.git .
           git checkout ${{ github.sha }}
 
-      - name: Setup Python
-        uses: actions/setup-python@v4
-        with:
-          python-version: '3.9'
+      - name: Install Python
+        run: |
+          apt-get update
+          apt-get install -y python3 python3-pip python3-venv
+          python3 --version
 
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
-          pip install -r requirements.txt
-          pip install pytest flake8
+          python3 -m pip install --upgrade pip
+          pip3 install -r requirements.txt
+          pip3 install pytest flake8
 
       - name: Lint with flake8
         run: |