[css-cascade-*] Consistently use 'precedence' rather than 'priority'.

Author: tabatkins

css-cascade-3/Overview.bs

@@ -699,7 +699,7 @@ Cascading</h2>
 Cascade Sorting Order</h3>
 
 	The cascade sorts declarations according to the following criteria,
-	in descending order of priority:
+	in descending order of precedence:
 
 	<dl>
 		<dt id='cascade-origin'>Origin and Importance

css-cascade-4/Overview.bs

@@ -935,7 +935,7 @@ Cascading</h2>
 Cascade Sorting Order</h3>
 
 	The cascade sorts declarations according to the following criteria,
-	in descending order of priority:
+	in descending order of precedence:
 
 	<dl>
 		<dt id='cascade-origin'>Origin and Importance

css-cascade-5/Overview.bs

@@ -937,7 +937,7 @@ Cascading</h2>
 Cascade Sorting Order</h3>
 
 	The cascade sorts declarations according to the following criteria,
-	in descending order of priority:
+	in descending order of precedence:
 
 	<dl>
 		<dt id='cascade-origin'>Origin and Importance
@@ -1244,7 +1244,7 @@ Cascade Layers</h3>
 	<div class="example">
 		For example,
 		authors could override the animation from a framework,
-		by providing keyframes with the same name in a higher-priority layer:
+		by providing keyframes with the same name in a higher-precedence layer:
 
 		<pre class='lang-css'>
 			/* establish the layer order, so the "override" layer takes precedence */
@@ -1268,7 +1268,7 @@ Cascade Layers</h3>
 		</pre>
 
 		In this case the ''override'' layer
-		has a higher cascade priority than the ''framework'' layer,
+		has a higher cascade precedence than the ''framework'' layer,
 		so <code>slide-left</code> will animate
 		using the <code>translate</code> property rather than <code>margin-left</code>.
 	</div>
@@ -1513,7 +1513,7 @@ Layer Ordering</h4>
 		The outer layers are sorted first,
 		with any unlayered style rules
 		added to an implicit outer layer which
-		has higher priority than (comes after) the explicit layers:
+		has higher precedence than (comes after) the explicit layers:
 
 		1. ''reset''
 		2. ''framework''
@@ -1872,7 +1872,7 @@ Rolling Back Cascade Layers: the ''revert-layer'' keyword</h4>
 	and the intervening [=animation origin=],
 	and not any of the intervening [=author-origin=] [=important=] rules.
 
-	Note: If there are no lower-priority declarations
+	Note: If there are no lower-precedence declarations
 	in the same [=cascade origin=] as the ''revert-layer'' value,
 	the <a>cascaded value</a> will roll back to the previous origin.
 
@@ -2025,7 +2025,7 @@ Changes since the 19 March 2021 Working Draft</h3>
 	Significant changes since the <a href="https://www.w3.org/TR/2021/WD-css-cascade-5-20210319/">19 March 2021 Working Draft</a> include:
 
 	* Switched the ordering of unlayered styles
-		from highest to lowest priority in the normal origins.
+		from highest to lowest precedence in the normal origins.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/6284">Issue 6284</a>)
 
 <h3 id="changes-2021-01">

css-cascade-6/Overview.bs

@@ -65,7 +65,7 @@ Cascading</h2>
 Cascade Sorting Order</h3>
 
 	The cascade sorts declarations according to the following criteria,
-	in descending order of priority:
+	in descending order of precedence:
 
 	<dl>
 		<dt id='cascade-origin'>Origin and Importance