fixup: Update BotBase.process_commands docstring to be more explicit

pydis_core/_bot.py

@@ -232,7 +232,11 @@ async def wait_until_guild_available(self) -> None:
         await self._guild_available.wait()
 
     async def process_commands(self, message: discord.Message) -> None:
-        """Wait until all extensions are loaded before processing commands."""
+        """
+        Overwrite default Discord.py behaviour to process commands only after ensuring extensions are loaded.
+
+        This extension check is only relevant for clients that make use of :obj:`pydis_core.BotBase.load_extensions`.
+        """
         if self._extension_loading_task:
             await self._extension_loading_task
         await super().process_commands(message)