fix(GuildBanManager): send reason in the headers instead of json body (#6800)

src/managers/GuildBanManager.js

@@ -144,10 +144,8 @@ class GuildBanManager extends CachedManager {
       .guilds(this.guild.id)
       .bans(id)
       .put({
-        data: {
-          reason: options.reason,
-          delete_message_days: options.days,
-        },
+        data: { delete_message_days: options.days },
+        reason: options.reason,
       });
     if (user instanceof GuildMember) return user;
     const _user = this.client.users.resolve(id);