Fix indentation error in main.py

main.py

@@ -9214,7 +9214,7 @@ async def rotation_chat_completions(request: Request, body: ChatCompletionReques
         logger.error(f"Available rotations: {list(config.rotations.keys())}")
         raise HTTPException(
             status_code=404,
-                detail=f"User rotation '{actual_model}' not found. Available: {list(handler.rotations.keys())}"
+            detail=f"Rotation '{body.model}' not found. Available: {list(config.rotations.keys())}"
         )
 
     logger.info(f"Model '{body.model}' found in rotations")