Update AnimationClipProvider.yaml (#1070)

Fixes some slight misinfo that is copied from
[RegisterActiveAnimationClip](https://create.roblox.com/docs/reference/engine/classes/AnimationClipProvider#RegisterActiveAnimationClip)
into
[RegisterAnimationClip](https://create.roblox.com/docs/reference/engine/classes/AnimationClipProvider#RegisterAnimationClip)
as placeholder. RegisterActiveAnimationClip generates an `active://`
URL, while RegisterAnimationClip generates a hash. Both do not generate
a `active://` URL.

Documentation issue was brought to my attention
[here](https://devforum.roblox.com/t/registeractiveanimationclip-and-registeranimationclip-has-seemingly-identical-descriptions-with-similar-word-choices/3598095)
by [@TaylorsRus](https://devforum.roblox.com/u/TaylorsRus).

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Author: sammygrey

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

@@ -131,7 +131,7 @@ methods:
 
       This function performs the same function to
       `Class.AnimationClipProvider:RegisterActiveAnimationClip()|RegisterActiveAnimationClip`
-      yet generates an _active://_ URL instead of a hash.
+      yet generates a hash instead of an `active://` URL.
 
       The ID generated can be used for the `Class.Animation.AnimationId`
       property to test animations.