Fix webhook messages being parsed unnecessarily (#4346)

This wasted CPU time parsing responses from Discord that we will never use, plus caused problems when parsing webhooks that our library couldn't parse correctly (MinnDevelopment/discord-webhooks#36).

Author: JRoy

EssentialsDiscord/src/main/java/net/essentialsx/discord/util/DiscordUtil.java

@@ -52,6 +52,7 @@ private DiscordUtil() {
      */
     public static WebhookClient getWebhookClient(long id, String token, OkHttpClient client) {
         return new WebhookClientBuilder(id, token)
+                .setWait(false)
                 .setAllowedMentions(AllowedMentions.none())
                 .setHttpClient(client)
                 .setDaemon(true)