[css-tables] Fix w3c#1051 in css-tables by linking to css-3-sizing

Author: FremyCompany

css-tables-3/Overview.bs

@@ -1865,7 +1865,7 @@ spec:css22; type:property; text:display
 				It is further clarified that
 					a cell is considered to have its height specified explicitly
 					if the computed height of the cell or any of its table ancestors is a length or percentage,
-					and that percentage does not <a href="https://github.com/w3c/csswg-drafts/issues/1051">behave as auto</a>.
+					and that percentage does not <a>behave as auto</a>.
 
 			</div>