Pin the NDSL version to a release

[twicki]

Description

As per discussion in NOAA-GFDL/NDSL#430, we move to released dependencies in pySHiELD as well.

How Has This Been Tested?
as long as the CI is happy, so are we

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules
• New check tests, if applicable, are included
• Targeted model, if this change was triggered by a model need/shortcoming

[oelbert]

Should we update the Python versions too while we're here?

[oelbert]

Should this update to be >=3.11.7, <3.14?

[twicki]

done