Remove css-transforms-1 from pre-CR exclusions (w3c#5875)

Since [css-transforms-1] has been a CR since 2019 and is already listed in the Official Definition, it seems unreasonable to keep it among the pre-CR excections in the 2020 snapshot. I assume this is an editorial fix.

Author: SelenIT

css-2020/Overview.bs

@@ -761,10 +761,9 @@ Safe to Release pre-CR Exceptions</h2>
 	prior to the spec reaching Candidate Recommendation:
 	<ul>
 		<li>Everything in
-		<a href="https://www.w3.org/TR/css-animations-1/">CSS Animations Level 1</a>,
-		<a href="https://www.w3.org/TR/css-transitions-1/">CSS Transitions Level 1</a>,
+		<a href="https://www.w3.org/TR/css-animations-1/">CSS Animations Level 1</a>
 		and
-		<a href="https://www.w3.org/TR/css-transforms-1/">CSS Transforms Level 1</a>.
+		<a href="https://www.w3.org/TR/css-transitions-1/">CSS Transitions Level 1</a>.
 		<li>The '':dir()'', '':lang()'', and '':focus-within'' pseudo-classes from [[SELECTORS-4]].
 	</ul>