[FR]: update example to use xarray-beam

Copying from https://www.linkedin.com/posts/stephanhoyer_high-level-datasets-activity-7381776384760803328-B0vO

### Feature Summary

https://xarray-beam.readthedocs.io/en/latest/high-level.html

Xee was intended to be used with Xarray-Beam! Here’s a now out-of-date example and documentation for how to run it. I would love to see this updated to work with the new xbeam.Dataset interface.

https://github.com/google/Xee/blob/main/examples/README.md

### Use Cases

TODO