DOC-2469: Fix release-notes.adoc table (#3387)

Author: Farzad Hayat

modules/ROOT/pages/release-notes.adoc

@@ -52,6 +52,6 @@ xref:7.0-release-notes.adoc#overview[{productname} 7.0]
 Release notes for {productname} 7.0
 
 // Uncomment this dummy cell when the number of cells above is odd to ensure the table renders correctly.
-// a|
+a|
 
 |===