description of screen fingerprinting is not accurate

[arthuredelstein]

Currently the screen fingerprinting section says:

How is this used in your fingerprint?
While this metric can supplement other information, it’s often too ‘brittle’ to be usable by trackers because users can easily change their browser window dimensions.

That's not correct for the window.screen fingerprinting API tested by Cover Your Tracks here. The values returned by window.screen.width and window.screen.height do not depend on browser window dimensions; instead they report the device screen resolution (width and height in pixels) and therefore this metric is actually fairly robust. (The reported screen size is only going to change if the user changes the screen hardware they are using.)

[arthuredelstein]

cc @ShivanKaul