Set envvar OMP_NUM_THREDS=1 in spindynamics notebooks

[andrea-petrocchi]

Closes MaMMoS-project/management#362

[fangohr]

Thank you.

Three items of feedback:

1. It appears the actual change to the notebook is missing:

2. The change in the metadata (change of python version used) should not be in the commit change, I think.

3. For this tiny change I would suggest we merge (once resolved), and force push the tag 0.11.0 again to get an update of the webpages. We may have more small changes on the wording of the notebooks, which also do not warrant a new version I think. If we do this, we don't need add 58.fixed.mi I think. (Do you agree?)

[andrea-petrocchi]

I run the whole notebook and pushed the changes.

1. The right changes are in there for me:
   
   Anyway, the notebook in the branch seems to be correct with the changes: https://github.com/MaMMoS-project/mammos/blob/omp-num-threads/examples/spindynamics-temperature-dependent-parameters.ipynb
2. I can delete that change.
3. The notebook requires a patch in mammos-spindynamics.

For me this would be the best to-do-list:

1. I have already pushed that fix to main but I have not published the package.
2. When PR 55 is also approved, I would publish mammos-spindynamics 0.3.1.
3. Then I would set mammos-spindynamics 0.3.1 in this PR and publish a patch

If you don't agree, we can push this PR directly as well (but people running the notebook might see the list in the .info() in different order).

[lang-m]

For this tiny change I would suggest we merge (once resolved), and force push the tag 0.11.0 again to get an update of the webpages. We may have more small changes on the wording of the notebooks, which also do not warrant a new version I think. If we do this, we don't need add 58.fixed.mi I think. (Do you agree?)

Please never force-push a version tag to rebuild the webpages.

Instead, manually trigger the documentation action on main: https://github.com/MaMMoS-project/mammos/actions/workflows/documentation.yml and tick the box to deploy changes:

To get updated notebooks for binder only force-push the latest tag.