Update modules/ROOT/pages/7.7.0-release-notes.adoc

Author: abhinavgandham

modules/ROOT/pages/7.7.0-release-notes.adoc

@@ -30,7 +30,7 @@ The {productname} {release-version} release includes an accompanying release of
 
 **Advanced Typography** includes the following fix.
 
-=== Serbian and Ukrainian languages were spelled incorrectly.
+==== Serbian and Ukrainian languages were spelled incorrectly.
 // #TINY-11713
 
 Previously, an issue was identified where `Ukrainian` and `Serbian` were incorrectly spelt in the typography plugin.