[css-overflow-3] Update issue number

Author: frivoal

css-overflow-3/Overview.bs

@@ -887,7 +887,7 @@ Indicating Block-Axis Overflow: the 'block-ellipsis' property</h3>
 	However, if any part of the [=block overflow ellipsis=] overflows,
 	its rendering is affected by the 'text-overflow' property.
 
-	Issue(2882): There is a suggestion to actually define the behavior
+	Issue(3213): There is a suggestion to actually define the behavior
 	when the ellipsis is too long to fit the line.
 
 	The <a>block overflow ellipsis</a> does not capture events: