Just a CI fix not to upgrade pip

.github/workflows/ci.yml

@@ -26,8 +26,7 @@ jobs:
         cache-dependency-path: pyproject.toml
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
-        pip install -e .[dev]
+        pip install --disable-pip-version-check -e .[dev]
     - name: Linting tests
       run: |
         black --check --diff v4l2py tests examples