[mediaqueries-5] Phrasing tweaks

Author: frivoal

mediaqueries-5/Overview.bs

@@ -1896,9 +1896,9 @@ color depth, and contrast ratio that are supported by the user agent and output
 	<dd>
 		The user agent and the output device
 		fulfill all of the following criteria:
-		* it has a [=high peak brightness=]
-		* it has a [=high contrast ratio=]
-		* its color depth is greater than 24 bit or 8 bit per color component of RGB
+		* they support a [=high peak brightness=]
+		* they support a [=high contrast ratio=]
+		* the color depth is greater than 24 bit or 8 bit per color component of RGB
 
 		Note: Some devices have high dynamic range capabilities that are not always on,
 		and that need to be activated