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

Author: abhinavgandham

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

@@ -166,7 +166,7 @@ For information on the **Image Optimizer** plugin, see: xref:uploadcare.adoc[Ima
 [[improvements]]
 == Improvements
 
-{productname} {release-version} also includes the following improvement<s>:
+{productname} {release-version} also includes the following improvements:
 
 === Extended the `forceReadOnly` functionality to support the new `disabled` option in addition to readonly mode.
 // #TINY-11490