ci: pin down flake8, because 7.0.0 it conflicts with old ansible

.github/workflows/tests.yaml

@@ -35,8 +35,8 @@ jobs:
           python-version: ${{ matrix.python_version }}
       - name: Install dependencies
         run: |
+          pip install flake8==6.1.0 pytest
           python -m pip install --upgrade pip
-          pip install flake8 pytest
           pip install -r requirements.txt
       - name: Sanity tests with dependencies
         run: ansible-test sanity --requirements --python ${{ matrix.python_version }}
@@ -62,7 +62,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install flake8 pytest
+          pip install flake8==6.1.0 pytest
           pip install -r requirements.txt
       - name: Configure integration tests
         run: |
@@ -105,7 +105,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install flake8 pytest
+          pip install flake8==6.1.0 pytest
           pip install -r requirements.txt
       - name: Configure integration tests
         run: |