Improve comment clarity in weathercocking aligned case

Co-authored-by: aZira371 <99824864+aZira371@users.noreply.github.com>

Author: Copilot

rocketpy/simulation/flight.py

@@ -1964,7 +1964,7 @@ def u_dot_generalized_3dof(self, t, u, post_processing=False):
                     # 180 degree rotation: sin(angle) = 1
                     omega_mag = self.weathercock_coeff * 1.0
                     omega_body = Kt @ (rotation_axis * omega_mag)
-                # else: aligned or nearly aligned, omega_body remains None
+                # else: aligned (dot > 0.999) - no rotation needed, omega_body stays None
 
             # Compute quaternion derivatives from omega_body
             if omega_body is not None: