Fix indent in dreambooth lora advanced SD 15 script (#8753)

update

examples/advanced_diffusion_training/train_dreambooth_lora_sd15_advanced.py

@@ -1856,10 +1856,10 @@ def main(args):
                 generator = torch.Generator(device=accelerator.device).manual_seed(args.seed) if args.seed else None
                 pipeline_args = {"prompt": args.validation_prompt}
 
-            if torch.backends.mps.is_available():
-                autocast_ctx = nullcontext()
-            else:
-                autocast_ctx = torch.autocast(accelerator.device.type)
+                if torch.backends.mps.is_available():
+                    autocast_ctx = nullcontext()
+                else:
+                    autocast_ctx = torch.autocast(accelerator.device.type)
 
                 with autocast_ctx:
                     images = [
@@ -1880,7 +1880,6 @@ def main(args):
                                 ]
                             }
                         )
-
                 del pipeline
                 torch.cuda.empty_cache()