[css-overflow-4] Fix markup typo

Author: frivoal

css-overflow-4/Overview.bs

@@ -1128,7 +1128,7 @@ Fragmentation of Overflow: the 'continue' property
 	* If the [=specified value=] of the 'display' property is ''-webkit-box'',
 		the [=computed value=] becomes ''flow-root'' and
 		the box establishes a [=BFC=].
-	* If the [=specified value=] of the 'display property is ''-webkit-inline-box'',
+	* If the [=specified value=] of the 'display' property is ''-webkit-inline-box'',
 		the [=computed value=] becomes ''inline-block'' and
 		the box establishes a [=BFC=].