[css-values-5][editorial] Fix some lingering <declaration-value> references. #9341

Author: tabatkins

css-values-5/Overview.bs

@@ -417,8 +417,8 @@ Interpolated Property Values: the ''mix()'' notation</h3>
 	</pre>
 
 	The first syntax alternative, like other [=mix notations=],
-	interpolates between the first <<declaration-value>> (its [=mix start value=])
-	and the second <<declaration-value>> (its [=mix end value=]).
+	interpolates between the first <<whole-value>> (its [=mix start value=])
+	and the second <<whole-value>> (its [=mix end value=]).
 	The second uses the [=mix progress value=]
 	to interpolate the corresponding property declarations from a set of keyframes,
 	allowing for more complex interpolation curves.
@@ -428,7 +428,7 @@ Interpolated Property Values: the ''mix()'' notation</h3>
 	because the values themselves can contain commas.
 
 	For the standard [=mix notation=] variant,
-	if the two <<declaration-value>>s being interpolated by ''mix()''
+	if the two <<whole-value>>s being interpolated by ''mix()''
 	are [=interpolation|interpolable=]
 	as values for the property in which it is specified,
 	and the interpolated value can be represented without ''mix()'',
@@ -439,7 +439,7 @@ Interpolated Property Values: the ''mix()'' notation</h3>
 	the [=computed value=] of ''mix()'' is
 	the ''mix()'' [=functional notation=] itself
 	with its <<progress>> value computed
-	and its <<declaration-value>>s (if provided)
+	and its <<whole-value>>s (if provided)
 	computed as values for this property.
 
 	<div class="example">