Install the packages so 'coverage xml' works correctly.

This is ugly, duplicating the dependencies here. Once everything is working this is probably better done by having tox do coverage xml and grabbing it from there.

.github/workflows/tiobe.yaml

@@ -12,7 +12,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
       - name: Install dependencies
-        run: pip install tox~=4.2 coverage[toml] flake8 pylint
+        run: pip install tox~=4.2 coverage[toml] flake8 pylint websocket-client==1.* pyyaml==6.* pytest~=7.2 pytest-operator~=0.23
       - name: Generate coverage report
         run: |
           tox -e unit