feat: add extra condition which asserts emoji equality

Author: christolis

application/src/main/java/org/togetherjava/tjbot/features/basic/CoolMessagesBoardManager.java

@@ -123,6 +123,10 @@ private static MessageEmbed createQuoteEmbed(Message message) {
      * Checks a {@link MessageReaction} to see if the bot has reacted to it.
      */
     private static boolean hasBotReacted(JDA jda, MessageReaction messageReaction) {
+        if (!REACT_EMOJI.equals(messageReaction.getEmoji())) {
+            return false;
+        }
+
         return messageReaction.retrieveUsers()
             .parallelStream()
             .anyMatch(user -> jda.getSelfUser().getIdLong() == user.getIdLong());