fix bug

scheduler/scheduler_config.json

@@ -11,7 +11,7 @@
   "lambda_min_clipped": -5.1,
   "lower_order_final": true,
   "num_train_timesteps": 1000,
-  "prediction_type": "epsilon",
+  "prediction_type": "v_prediction",
   "sample_max_value": 1.0,
   "solver_order": 2,
   "solver_type": "midpoint",
@@ -20,5 +20,5 @@
   "timestep_spacing": "linspace",
   "trained_betas": null,
   "use_karras_sigmas": false,
-  "variance_type": "learned_range"
+  "variance_type": "fixed_small"
 }