[mediaqueries-4] Minor wording tweak

Author: frivoal

mediaqueries/Overview.bs

@@ -714,7 +714,7 @@ Combining Media Features {#media-conditions}
 		by placing ''or'' between them.
 		For example, ''(update: slow) or (hover: none)''
 		matches if the device is slow to update the screen (such as an e-reader)
-		<em>or</em> the device's primary pointing device has no hover capability,
+		<em>or</em> the primary pointing device has no hover capability,
 		perhaps indicating that one should use a layout that displays more information
 		rather than compactly hiding it until the user hovers.