🐛 Fix output file reference in effective charge and impurity char…

[chris-ashe]

Prevent spamming of charge profile to OUT.DAT

Description

Checklist

I confirm that I have completed the following checks:

• My changes follow the PROCESS style guide
• I have justified any large differences in the regression tests caused by this pull request in the comments.
• I have added new tests where appropriate for the changes I have made.
• If I have had to change any existing unit or integration tests, I have justified this change in the pull request comments.
• If I have made documentation changes, I have checked they render correctly.
• I have added documentation for my change, if appropriate.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.04%. Comparing base (aa129eb) to head (1d81bac).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3989   +/-   ##
=======================================
  Coverage   46.04%   46.04%           
=======================================
  Files         123      123           
  Lines       28962    28962           
=======================================
  Hits        13336    13336           
  Misses      15626    15626           

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