[nit] Add units to zField

[samwaseda]

This pull request makes a minor documentation update to the zField parameter in the input_data.yml file for the Sphinx parser. The update clarifies the units for zField and improves the parameter description.

• Documentation improvements:
  • Added the units: eV/bohr field and clarified the description for the zField parameter in input_data.yml to specify the units and remove redundancy.

[github-actions]

👈 Launch a binder notebook on branch pyiron/sphinx_parser/units

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.54%. Comparing base (b6692c8) to head (8ccdde9).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #73   +/-   ##
=======================================
  Coverage   88.54%   88.54%           
=======================================
  Files           8        8           
  Lines         812      812           
=======================================
  Hits          719      719           
  Misses         93       93           

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[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 Metrics 0 complexity · 2 duplication

Metric	Results
Complexity	0
Duplication	2

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