Update modules/ROOT/pages/8.4.0-release-notes.adoc

Co-authored-by: Millie <millie.macdonald@tiny.cloud>

Author: kemister85

modules/ROOT/pages/8.4.0-release-notes.adoc

@@ -356,7 +356,7 @@ In {productname} {release-version}, an issue was identified where certain deleti
 
 {productname} {release-version} addresses this by updating the key handler registration to occur during the `init` phase, and additional checks now ensure that previously prevented events are respected.
 
-=== Deleting a selection in an `li` didn't trigger `beforeinput`.
+=== Deleting a selection in a `li` didn't trigger `beforeinput`.
 // #TINY-12793
 
 Previously, deleting a selection inside a list item or pressing Backspace at the start of a list item did not fire the native `beforeinput` event. The editor's list key handler prevented the `keydown` event before performing the deletion, which also suppressed the `beforeinput` event. This affected integrations and plugins that relied on `beforeinput` to intercept or customize deletion behavior in lists.