Request for units on D1S method

[shimwell]

Is anyone able to help me understand the units of the tally.mean after it has been corrected in the D1S example

Just a tiny comment here to mention the units would be super helpful

https://github.com/openmc-dev/fes-sdr-project/blob/6d43a7b25b0d351b8eec7f37bc7a3074a23fc30c/d1s-demo/d1s_workflow.py#L90C33-L90C37