Add a last_updated key in metadata

Author: kyb3r

bot.py

@@ -437,8 +437,9 @@ async def data_loop(self):
                 "member_count": len(self.guild.members),
                 "uptime": (datetime.datetime.utcnow() - self.start_time).total_seconds(),
                 "latency": f'{self.ws.latency * 1000:.4f}',
-                "version": __version__,
-                "selfhosted": self.selfhosted
+                "version": self.version,
+                "selfhosted": self.selfhosted,
+                "last_updated": str(datetime.datetime.utcnow())
             }
 
             await self.modmail_api.post_metadata(data)