[css-color-adjust-1] Fix links to canvas. w3c#4772 (comment)

css-color-adjust-1/Overview.bs

@@ -15,6 +15,9 @@ Editor: Rune Lillesveen, Google, futhark@google.com, w3cid 45291
 Editor: Tab Atkins Jr., Google, http://www.xanthir.com/contact/, w3cid 42199
 Abstract: This module introduces a model and controls over automatic color adjustment by the user agent to handle user preferences, such as "Dark Mode", contrast adjustment, or specific desired color schemes.
 </pre>
+<pre class='link-defaults'>
+spec:css2;type:dfn;text:canvas
+</pre>
 
 Introduction {#intro}
 =====================
@@ -79,7 +82,7 @@ Preferred Color Schemes {#preferred}
 	(see 'color-scheme'),
 	the user agent must match the following to the user's preferred [=color scheme=]:
 
-	* the initial color of the <a href="https://www.w3.org/TR/CSS2/intro.html#canvas">canvas</a>
+	* the initial color of the [=canvas=]
 	    <span class=issue>find what we name this in other specs</span>,
 		the initial value of the '/color' property,
 		and the [[css-color-4#css-system-colors|system colors]]
@@ -237,7 +240,7 @@ Effects of the Used Color Scheme {#color-scheme-effect}
 	to match with the intent of the [=color scheme=].
 
 	On the root element,
-	rendering with a [=color scheme=] additionally must affect the background of the canvas,
+	rendering with a [=color scheme=] additionally must affect the background of the [=canvas=],
 	the initial value of the '/color' property,
 	and the used values of the [[css-color-4#css-system-colors|system colors]],
 	and should also affect the viewport's scrollbars.
@@ -329,7 +332,7 @@ Forced Color Schemes: the 'forced-color-adjust' property {#forced}
 	(see [[CSS-COLOR-4]]).
 	Additionally,
 	if the UA determines, based on Lab lightness,
-	that the canvas color
+	that the ''Canvas'' color
 	is clearly either dark (L < 33%) or light (L > 67%),
 	then it must match the appropriate value
 	of the '@media/prefers-color-scheme' media query