fix: Install zbar since tests didnt want to pass without it

Author: baalimago

.github/workflows/test-python-index.yaml

@@ -28,6 +28,7 @@ jobs:
           python-version: ${{ inputs.python-version }}
       - name: Setup environment
         run: |
+          sudo apt-get install libzbar0
           pip install .
           pip install pytest
       # Validate that the python tests themselves are valid