Don't overwrite custom vtk wheels for arm64

Author: Oblynx

.github/workflows/build-ocp.yml

@@ -181,7 +181,8 @@ jobs:
           cp $CONDA_PREFIX/lib/python$PY_VER/site-packages/vtkmodules/${{ matrix.vtk_libs }} $DEST/lib/
           cp $CONDA_PREFIX/lib/python$PY_VER/site-packages/vtk.py $DEST
 
-          if [[ "$RUNNER_OS" == "Linux" && "$PY_VER" != "3.13" ]]; then
+          # vtk.libs only exists in official PyPI VTK wheels, not in custom cadquery_vtk wheels
+          if [[ "$RUNNER_OS" == "Linux" && "$PY_VER" != "3.13" && "${{ matrix.os }}" != "ubuntu-22.04-arm" ]]; then
             cp $CONDA_PREFIX/lib/python$PY_VER/site-packages/vtk.libs/* $DEST/lib/
           fi