[css-tables] Edorial: fixed typo

Author: FremyCompany

css-tables-3/Overview.bs

@@ -1911,7 +1911,7 @@ spec:css-sizing-3; type:property; text:box-sizing
 					where, if appropriate, percentage-based heights are this time resolved
 					against their parent cell used height.
 
-				<div class="note>
+				<div class="note">
 				Note that this means it is required to keep track of the usage of percentages
 					in the properties of any direct child of the table-cell including but not limited to
 					the 'height' and 'min-height' properties for horizontal flows and