Clarify how AnimationTrack:Stop() with a fadeTime of 0 affects Motor6Ds (#1036)

## Changes

When calling `AnimationTrack:Stop()` with a fadeTime of 0, poses do not
freeze under all circumstances. It happens due to the `MaxVelocity` of
Motor6Ds in the rig being zero, meaning they cannot return back to their
desired angle (since they inherit Motors).

I believe the misconception in the passage I edited was due to the
default StarterCharacter rigs having the MaxVelocity of all joints set
to zero rather than something like tau (which should be optimal, given
MaxVelocity is in radians). I've also tested this below.

Rig with MaxVelocity set to 0 for all Motor6Ds, calling
`AnimationTrack:Stop(0)`:

![RobloxStudioBeta_aAWKhiW44t](https://github.com/user-attachments/assets/5ba4f82d-5300-483f-94c5-e952be078998)

Rig with MaxVelocity set to tau for all Motor6Ds, calling
`AnimationTrack:Stop(0)`:

![RobloxStudioBeta_erHkiFJMix](https://github.com/user-attachments/assets/80ca2302-5156-4688-b1ba-f523c31032c8)

Bones are not affected by this issue since they do not inherit Motor.

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- [x] This contribution was created in whole or in part by me, and I
have the right to submit it under the terms of this repository's open
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terms of this repository's open source licenses.
- [x] To the best of my knowledge, all proposed changes are accurate.

---------

Co-authored-by: IgnisRBX <[email protected]>

Author: Starveldt

content/en-us/reference/engine/classes/AnimationTrack.yaml

@@ -601,24 +601,21 @@ methods:
     writeCapabilities: []
   - name: AnimationTrack:Stop
     summary: |
-      Stops the `Class.AnimationTrack`. Once called playback of the
-      `Class.AnimationTrack` will stop and the weight of the animation will move
-      towards zero over a length of time specified by the optional fadeTime
-      parameter.
+      Stops the `Class.AnimationTrack`.
     description: |
-      Stops the `Class.AnimationTrack`. Once called playback of the
-      `Class.AnimationTrack` will stop and the weight of the animation will move
-      towards zero over a length of time specified by the optional fadeTime
-      parameter.
-
-      For example, if Stop is called with a fadeTime of 2 seconds it will take
-      two seconds for the weight of the `Class.AnimationTrack` to reach zero and
-      its effects completely end. Please note this will be the case regardless
-      of the initial weight of the animation.
-
-      It is not recommended to use a fadeTime of 0 seconds to try to override
-      this effect and end the animation immediately as presently, this causes
-      the `Class.AnimationTrack` poses to freeze.
+      Stops the `Class.AnimationTrack`. Once called, the weight of the animation
+      will move towards zero over a length of time specified by the optional
+      `fadeTime` parameter. For example, if `Stop()` is called with a `fadeTime`
+      of `2`, it will take two seconds for the weight of the track to reach
+      zero and its effects completely end. Please note this will be the case
+      regardless of the initial weight of the animation.
+
+      It is not recommended to use a `fadeTime` of `0` in an attempt to override
+      this effect and end the animation immediately for `Class.Motor6D|Motor6Ds`
+      that have their `Class.Motor.MaxVelocity` set to zero, as this causes
+      the joints to freeze in place. If it must end immediately, ensure the
+      `Class.Motor.MaxVelocity` of `Class.Motor6D|Motor6Ds` in your rig are
+      high enough for them to snap properly.
     code_samples:
       - AnimationTrack-Stop
     parameters: