[css-will-change] will-change is not animatable

Discussed in Sydney 2018 F2F
w3c#2737 (comment)

Author: ericwilligers

css-will-change-1/Overview.bs

@@ -174,6 +174,7 @@ Hinting at Future Behavior: the 'will-change' property</h2>
 	Inherited: no
 	Percentages: n/a
 	Computed value: specified value
+	Animation type: not animatable
 	</pre>
 
 	<pre class='prod'><dfn>&lt;animateable-feature></dfn> = scroll-position | contents | <<custom-ident>></pre>
@@ -305,3 +306,4 @@ Changes since the April 29 2014 Working Draft {#changes}
 
 * Added an explanatory section giving guidance on how to use 'will-change' well.
 * Specified the behavior of shorthands
+* Change the animation type of the will-change property to not animatable