[css-color-4] Correct range of hue angles, #8838

Author: svgeesus

css-color-4/Overview.bs

@@ -978,7 +978,7 @@ which is interpreted as a number of degrees
 and is the [=canonical unit=].
 
 This number is normalized
-to the range [0,360].
+to the range [0,360).
 
 Note: The angles and spacing
 corresponding to particular hues