Show old display name for name change events

BUG: 457664

imports/NeoChat/Component/Timeline/StateDelegate.qml

@@ -96,7 +96,7 @@ Control {
             Layout.preferredHeight: icon.height
             wrapMode: Text.WordWrap
             textFormat: Text.RichText
-            text: `<style>a {text-decoration: none;}</style><a href="https://matrix.to/#/${author.id}" style="color: ${author.color}">${currentRoom.htmlSafeMemberName(author.id)}</a> ${aggregateDisplay}`
+            text: `<style>a {text-decoration: none;}</style><a href="https://matrix.to/#/${author.id}" style="color: ${author.color}">${model.authorDisplayName}</a> ${aggregateDisplay}`
             onLinkActivated: userDetailDialog.createObject(ApplicationWindow.overlay, {room: currentRoom, user: author.object, displayName: author.displayName, avatarMediaId: author.avatarMediaId, avatarUrl: author.avatarUrl}).open()
         }
     }