BUG: Fix `Environment.max_expected_height` for custom atmosphere

[Gui-FernandesBR]

Pull request type

• [ ] Code changes (bugfix, features)
• [ ] Code maintenance (refactoring, formatting, tests)
• [ ] ReadMe, Docs and GitHub updates
• [ ] Other (please describe):

Checklist

• [ ] Tests for the changes have been added (if needed)
• [ ] Docs have been reviewed and added / updated
• [ ] Lint (black rocketpy/ tests/) has passed locally
• [ ] All tests (pytest tests -m slow --runslow) have passed locally
• [ ] CHANGELOG.md has been updated (if relevant)

Current behavior

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New behavior

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Breaking change

• [ ] Yes
• [ ] No

Additional information

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 71.42857% with 2 lines in your changes missing coverage. Please review.

Project coverage is 75.90%. Comparing base (b9b44dd) to head (7ce1cad). Report is 18 commits behind head on develop.

Files with missing lines	Patch %	Lines
rocketpy/environment/environment.py	71.42%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #707 +/- ## =========================================== - Coverage 76.02% 75.90% -0.12% =========================================== Files 99 99 Lines 11278 11222 -56 =========================================== - Hits 8574 8518 -56 Misses 2704 2704 ```

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[Gui-FernandesBR]

All tests, including slow tests, are passing locally. The CI is also all checked. it's time to merge.