refactor: remove unnecessary f-string

It is wasteful to use `f-string` mechanism if there are no expressions to be extrapolated. It is recommended to use regular strings instead.

bot.py

@@ -94,7 +94,7 @@ async def on_ready(self):
         Event handler for when the bot is ready.
         """
         activity = disnake.Activity(
-            type=disnake.ActivityType.listening, name=f"your commands"
+            type=disnake.ActivityType.listening, name="your commands"
         )
         await self.change_presence(activity=activity, status=disnake.Status.online)