`spsolve` is now imported via `numml.sparse.linalg`, not `numml.sparse`, so demos could use updating to reflect this, for example: https://github.com/nicknytko/numml/blob/main/demos/multigrid.ipynb
spsolveis now imported vianumml.sparse.linalg, notnumml.sparse, so demos could use updating to reflect this, for example: https://github.com/nicknytko/numml/blob/main/demos/multigrid.ipynb