[css-box-4][editorial] typo, fix #10637

Author: svgeesus

css-box-4/Overview.bs

@@ -622,7 +622,7 @@ Recent Changes {#changes}
 	Changes since the <a href="https://www.w3.org/TR/2022/WD-css-box-4-20221103/">3 November 2022 Working Draft</a> include:
 	* Removing the effect of 'margin-trim' on floats,
 		because there are use cases for both trimming and not trimming their margins,
-		and it is complicated to imlement.
+		and it is complicated to implement.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/8547">Issue 8547</a>)
 	* Clarifying that only descendant margins are trimmed by 'margin-trim'
 		even if self or sibling margins would have collapsed with the trimmed margin.