[css-images-3] Update Changes list

Author: fantasai

css-images-3/Overview.bs

@@ -1994,14 +1994,17 @@ Changes</h2>
 <h3 id="changes-20191010">
 Changes Since the <a href="https://www.w3.org/TR/2019/CR-css-images-3-20191010/">10 October 2019 Candidate Recommendation</a></h3>
 
-	Significant changes since the <a href="https://www.w3.org/TR/2020/CRD-css-images-3-20201217/">17 December 2020 CR</a>:
+	Significant changes since the <a href="https://www.w3.org/TR/2020/CRD-css-images-3-20201217/">17 December 2020 CRD</a>:
 
+	* Remove ''&&'' which allows reordering from <<linear-color-stop>>.
+		(<a href="https://github.com/w3c/csswg-drafts/pull/8021">Issue 8021</a>)
 	* Specify ''pixelated'' to use smooth scaling from a [=nearest neighbor=] scale to the nearest pixel multiple,
 		in order to avoid distortion.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/5837">Issue 5837</a>)
 	* Explicitly allow [=nearest neighbor=] as the implementation for ''crisp-edges'',
 		since this is what implementations currently do.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/6038">Issue 6038</a>)
+	* Various editorial / typo fixes in grammar productions.
 
 	Significant changes since the <a href="https://www.w3.org/TR/2019/CR-css-images-3-20191010/">10 October 2019 CR</a>: