Update landing gear documentation

Update landing gear documentation

TODO

Summary

Please correct the following typos/errors in the landing gear design documentation.

Subtasks

Design method

• Section "3. Vertical distance from tail tipping point to ground": Vertical must be horizontal

The vertical distance between the main landing gear and the tail tipping point d_MLG-TP

• Section "Limitations": At turn over Angle the \theta is not displayed as the sign
• Section "Limitations": At turn over Angle -> Change title to "Turn Over Angle"?

Acceptance Criteria

N/A