Minor spelling mistakes for CharacterBody2D and CharacterBody3D's MotionMode

**Your Godot version:**

4.4 Stable

**Issue description:**

Within the descriptions of MotionMode `Motion` is instead `Notion`.

Out of curiosity, I checked CharacterBody3D and the issue is there as well.

For MOTION_MODE_GROUNDED:
> Apply when notions of walls, ceiling and floor are relevant.

Should be

> Apply when the motions of walls, ceiling and floor are relevant.

For MOTION_MODE_FLOATING:
> Apply when there is no notion of floor or ceiling.

Should be

> Apply when there is no motion of the floor or ceiling

**URL to the documentation page:**

https://docs.godotengine.org/en/latest/classes/class_characterbody2d.html#enum-characterbody2d-motionmode

https://docs.godotengine.org/en/latest/classes/class_characterbody3d.html#enum-characterbody3d-motionmode