VoiceOver: read focused message id from firstMessage accessor

Co-authored-by: D3C0Y <decoder-dev@users.noreply.github.com>

Author: decoder-dev

submodules/TelegramUI/Sources/ChatHistoryListNode.swift

@@ -3932,7 +3932,7 @@ public final class ChatHistoryListNodeImpl: ASDisplayNode, ChatHistoryNode, Chat
         if UIAccessibility.isVoiceOverRunning {
             self.forEachVisibleMessageItemNode { itemNode in
                 if accessibilityFocusedMessageId == nil, itemNode.accessibilityContainsFocus(), let item = itemNode.item {
-                    accessibilityFocusedMessageId = item.content.first?.0.id
+                    accessibilityFocusedMessageId = item.content.firstMessage.id
                 }
             }
         }