Normalize README folder tree formatting

README.md

@@ -17,9 +17,9 @@ Place the files in the following folders:
 
 ```
 📂 ComfyUI/
-└── 📂 models/
-    └── 📂 upscale_models/
-        └── RealESRGAN_x4plus.safetensors
+├── 📂 models/
+│   ├── 📂 upscale_models/
+│   │   └── RealESRGAN_x4plus.safetensors
 ```
 
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