Add 10065 Error code (#2178)

Co-authored-by: Discord.Net Robot <robot@elons.sweatshop.stop>

src/Discord.Net.Core/DiscordErrorCode.cs

@@ -48,6 +48,7 @@ namespace Discord
         UnknownSticker = 10060,
         UnknownInteraction = 10062,
         UnknownApplicationCommand = 10063,
+        UnknownVoiceState = 10065,
         UnknownApplicationCommandPermissions = 10066,
         UnknownStageInstance = 10067,
         UnknownGuildMemberVerificationForm = 10068,