Temporary pin miniforge to avoid mamba>=2.6.0

[valeriupredoi]

Description

Ben is still working on avoiding FileNotFound's in conda/conda-lock#906 so we can simply limit the miniforge version until he's done with the work upstream.

Closes #334

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• ☝ Create an issue to discuss what you are going to do

Checklist

• This pull request has a descriptive title and labels
• This pull request has a minimal description (most was discussed in the issue, but a two-liner description is still desirable)
• Unit tests have been added (if codecov test fails)
• Any changed dependencies have been added or removed correctly (if need be)
• If you are working on the documentation, please ensure the current build passes
• All tests pass

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.13%. Comparing base (cb5b5c9) to head (ba1c88b).
⚠️ Report is 10 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #339   +/-   ##
=======================================
  Coverage   93.13%   93.13%           
=======================================
  Files           7        7           
  Lines         685      685           
=======================================
  Hits          638      638           
  Misses         47       47           

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