Fix Future Warning

FutureWarning: The configuration file of this scheduler is outdated. `steps_offset` should be set to 1 instead of 0. Please make sure to update the config accordingly as leaving `steps_offset` might led to incorrect results in future versions. If you have downloaded this checkpoint from the Hugging Face Hub, it would be very nice if you could open a Pull request for the `scheduler/scheduler_config.json` file

scheduler/scheduler_config.json

@@ -13,6 +13,7 @@
   "rescale_betas_zero_snr": false,
   "sample_max_value": 1.0,
   "set_alpha_to_one": false,
+  "steps_offset": 1,
   "skip_prk_steps": true,
   "timestep_spacing": "trailing"
 }