Reveal correct trivia answer in the end

Currently there is no feedback which answer was correct, so it is not possible to learn from mistakes.

src/backend/games/builtin/trivia/trivia-command.js

@@ -69,7 +69,7 @@ twitchListeners.events.on("chat-message", async (data) => {
 
         await twitchChat.sendChatMessage(`${chatMessage.userDisplayName ?? username}, that is correct! You have won ${util.commafy(winnings)} ${currency.name}`, null, chatter);
     } else {
-        await twitchChat.sendChatMessage(`Sorry ${chatMessage.userDisplayName ?? username}, that is incorrect. Better luck next time!`, null, chatter);
+        await twitchChat.sendChatMessage(`Sorry ${chatMessage.userDisplayName ?? username}, that is incorrect. The answer was ${question.correctIndex}. Better luck next time!`, null, chatter);
     }
     clearCurrentQuestion();
 });
@@ -285,4 +285,4 @@ function purgeCaches() {
 
 exports.purgeCaches = purgeCaches;
 exports.registerTriviaCommand = registerTriviaCommand;
-exports.unregisterTriviaCommand = unregisterTriviaCommand;
+exports.unregisterTriviaCommand = unregisterTriviaCommand;