[css-color-hdr-1] Added display-p3-linear to color spaces for interpolation w3c#12596 (w3c#12639)

Author: cdoublev

css-color-hdr-1/Overview.bs

@@ -1068,7 +1068,7 @@ Mixing Dynamic Range Limits: the ''dynamic-range-limit-mix()'' function {#dynami
 	Its syntax is now as follows:
 
 	<pre class='prod'>
-		<dfn>&lt;predefined-rgb></dfn> = srgb | srgb-linear | display-p3 | a98-rgb | prophoto-rgb | rec2020 | 
+		<dfn>&lt;predefined-rgb></dfn> = srgb | srgb-linear | display-p3 | display-p3-linear | a98-rgb | prophoto-rgb | rec2020 | 
 			rec2100-pq | rec2100-hlg | rec2100-linear
 	</pre>
 
@@ -1940,4 +1940,4 @@ in a user stylesheet.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/10460">#10460</a>)</li>
 	<li>Defined "media white" more clearly</li>
 	<li>Collected together explanatory material into an introductory section</li>
-</ul>
+</ul>