Add apt-get update to avoid dev deps install failures

.github/workflows/pytest-unit-tests.yml

@@ -22,6 +22,7 @@ jobs:
     - name: Install test dependencies
       working-directory: tests
       run: |
+        sudo apt-get install
         sudo apt install libopenblas-dev # scipy
         pip install -r requirements.txt
     - name: Test with pytest