reST in ``MoveAlongPath`` not correct

[https://docs.manim.community/en/stable/reference/manim.animation.movement.MoveAlongPath.html](https://docs.manim.community/en/stable/reference/manim.animation.movement.MoveAlongPath.html)

![image](https://github.com/ManimCommunity/manim/assets/110117391/cb0a1d4a-a766-486b-9986-9e4fcb15e74a)

The ``..rubric:: Example`` should not be shown in the docs.