DOC: correct Flight aerodynamic moment units

[ting-hong-shieh]

Pull request type

• Code changes
• Code maintenance
• ReadMe, Docs and GitHub updates
• Other

Current behavior

The Flight.M1, Flight.M2, and Flight.M3 docstrings describe aerodynamic moments as Newtons (N), which is a force unit. Their Function output labels and the surrounding Flight documentation already identify these values as moments.

At merge base cb6106a717207dd8fc2dfe1446d80ff75022f21b, all three docstrings say:

Expressed in Newtons (N).

New behavior

At head 3ac68cdf16e65bd070c608d8b672dced429dbec6, the three docstrings say:

Expressed in Newton-metres (N·m).

No executable behavior changes.

Verification

• Searched the source and user documentation for M1, M2, and M3 unit descriptions; these were the three force-unit references.
• .venv/bin/ruff check rocketpy/simulation/flight.py: passed
• .venv/bin/ruff format --check rocketpy/simulation/flight.py: passed
• git diff --check: passed
• Sphinx 8.1.3 started with -W --keep-going and read the documentation until the first notebook conversion. The local build could not continue because Pandoc is not installed; no Sphinx warning from this change was reported before that external-tool failure.

The GitHub documentation job remains the complete Sphinx verification.

Environment: RocketPy 1.13.0; Python 3.12.6; Ruff 0.16.3; macOS 26.5.2 arm64.

Breaking change

• No

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.29%. Comparing base (e0ff281) to head (3ac68cd).
⚠️ Report is 53 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1149      +/-   ##
===========================================
+ Coverage    82.18%   83.29%   +1.11%     
===========================================
  Files          122      130       +8     
  Lines        16355    17080     +725     
===========================================
+ Hits         13441    14227     +786     
+ Misses        2914     2853      -61     

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[Gui-FernandesBR]

nice catch!