[css-box-4] Allowed combination of block and inline keywords in margin-trim (w3c#10427)

Author: SebastianZ

css-box-4/Overview.bs

@@ -373,7 +373,7 @@ Margins at Container Edges: the 'margin-trim' property {#margin-trim}
 
 	<pre class="propdef">
 		Name: margin-trim
-		Value: none | block | inline | [ block-start || inline-start || block-end || inline-end ]
+		Value: none | [ block || inline ] | [ block-start || inline-start || block-end || inline-end ]
 		Initial: none
 		Applies to: [=block containers=], [=multi-column containers=], [=flex containers=], [=grid containers=]
 		Inherited: no