fix: fix bug where indoor absolute humidity would have wrong value

[bachya]

Describe what the PR does:

We were calculating outdoor and indoor absolute humidity using the same values.

Does this fix a specific issue?

Fixes #997

Checklist:

• Confirm that one or more new tests are written for the new functionality.
• Run tests and ensure everything passes (with 100% test coverage).
• Update README.md with any new documentation.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (88cc736) to head (5a992ed).

Additional details and impacted files

@@            Coverage Diff            @@
##               dev      #999   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           32        32           
  Lines         1751      1761   +10     
=========================================
+ Hits          1751      1761   +10     

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