BUG: fixed AGL altitude in _FlightPrints.events_registered

[L30-stack]

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

_FlightPrints.events_registered() prints the AGL altitude at the event trigger time.

New behavior

_FlightPrints.events_registered() prints the AGL altitude at the open parachute time.

Breaking change

• Yes
• No

[Gui-FernandesBR]

Great and quick fix!!

Just need to update the CHANGELOG before finishing this one.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.48%. Comparing base (83aa20e) to head (1cd8fed).
Report is 24 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #788      +/-   ##
===========================================
+ Coverage    76.42%   79.48%   +3.06%     
===========================================
  Files           95       96       +1     
  Lines        11090    11499     +409     
===========================================
+ Hits          8475     9140     +665     
+ Misses        2615     2359     -256     

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[Gui-FernandesBR]

LGTM