Add to H2O-3 docs or github docs that we do not support numpy2 for now.

Users using installing numpy2 will not work with h2o-3.  The work around is

![image](https://github.com/user-attachments/assets/983fbf46-f4a5-4a44-9d82-048bcf388d91)

We need to alert the users about this before we fix it here: https://github.com/h2oai/h2o-3/issues/16295
