fix(PollAnswer): fetchVoters route changed to MessageManager (#10251)

Update PollAnswer.js

Author: XCraftTM

packages/discord.js/src/structures/PollAnswer.js

@@ -77,7 +77,7 @@ class PollAnswer extends Base {
    * @returns {Promise<Collection<Snowflake, User>>}
    */
   fetchVoters({ after, limit } = {}) {
-    return this.poll.message.channel.fetchPollAnswerVoters({
+    return this.poll.message.channel.messages.fetchPollAnswerVoters({
       messageId: this.poll.message.id,
       answerId: this.id,
       after,