try providing Matlab with a dummy pybind11_type module

Author: slayoo

.github/workflows/matlab.yml

@@ -38,6 +38,10 @@ jobs:
 
       - run: python -c "import cmake_example as m; m.AStruct()"
 
+      - run: |
+          echo "pybind11_type=type" > pybind11_type.py
+          echo "PYTHONPATH=." >> $GITHUB_ENV
+
       - uses: matlab-actions/setup-matlab@v0
         with:
           release: R2022a