Avoid unnecessary call to sync_commands (#1563)

Implement Fix

Author: BobDotCom

discord/bot.py

@@ -711,7 +711,7 @@ async def process_application_commands(self, interaction: Interaction, auto_sync
         try:
             command = self._application_commands[interaction.data["id"]]
         except KeyError:
-            for cmd in self.application_commands:
+            for cmd in self.application_commands + self.pending_application_commands:
                 guild_id = interaction.data.get("guild_id")
                 if guild_id:
                     guild_id = int(guild_id)