[css-contain-3][editorial] typos

Author: tabatkins

css-contain-3/Overview.bs

@@ -406,10 +406,10 @@ Creating Query Containers: the 'container-type' property</h3>
 
 	Unless otherwise noted,
 	all elements are [=query containers=]
-	for the purpose [=container queries=]
-	that do no require explicit containment
+	for the purpose of [=container queries=]
+	that do not require explicit [=containment=]
 	(such as [=container style queries=]),
-	reagardless of the specified 'container-type'.
+	regardless of the specified 'container-type'.
 
 	Values have the following meanings: