Ignore bots running !sync (#392)

Author: trag1c

app/components/developer.py

@@ -39,7 +39,7 @@ async def existing_extension_autocomplete(
     async def on_message(self, message: dc.Message) -> None:
         # Handle !sync command. This can't be a slash command because this command is
         # the one that actually adds the slash commands in the first place.
-        if message.content.strip() != "!sync":
+        if message.author.bot or message.content.strip() != "!sync":
             return
 
         if not self.bot.is_ghostty_mod(message.author):