Switch from Mambaforge to Miniforge

[pnuu]

Mambaforge has been deprecated, so lets switch to Miniforge (and still use mamba).

• Closes #xxxx
• Tests added
• Fully documented
• Add your name to AUTHORS.md if not there already

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.06%. Comparing base (f93e768) to head (99697f7).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2899   +/-   ##
=======================================
  Coverage   96.06%   96.06%           
=======================================
  Files         370      370           
  Lines       54320    54320           
=======================================
  Hits        52185    52185           
  Misses       2135     2135           

Flag	Coverage Δ
behaviourtests	3.99% <ø> (ø)
unittests	96.16% <ø> (ø)

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[coveralls]

Pull Request Test Coverage Report for Build 10787964016

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 96.166%

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Totals
Change from base Build 10704576446:	0.0%
Covered Lines:	52416
Relevant Lines:	54506

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💛 - Coveralls

[mraspaud]

LGTM