Normalize README folder tree formatting

README.md

@@ -15,13 +15,13 @@ Place the files in the following folders:
 
 ```
 📂 ComfyUI/
-└── 📂 models/
-    ├── 📂 diffusion_models/
-    │   └── omnigen2_fp16.safetensors
-    ├── 📂 text_encoders/
-    │   └── qwen_2.5_vl_fp16.safetensors
-    └── 📂 vae/
-        └── ae.safetensors
+├── 📂 models/
+│   ├── 📂 diffusion_models/
+│   │   └── omnigen2_fp16.safetensors
+│   ├── 📂 text_encoders/
+│   │   └── qwen_2.5_vl_fp16.safetensors
+│   ├── 📂 vae/
+│   │   └── ae.safetensors
 ```
 
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