update file structure

README.md

@@ -7,17 +7,17 @@ license: mit
 
 The dataset is organized into the following directory structure:
 
-| sony_IMX678_20240111/
-│     ├── RAW/
-│          ├── gt/
-│          │    └── Scene_Gain_Exposure_Sigma.npy
-│          ├── noisy/
-│          │    └── Scene_Gain_Exposure.npy
-│     ├── RGB/
-│          ├── gt/
-│          │    └── Scene_Gain_Exposure_Sigma.png
-│          ├── noisy/
-│          │    └── Scene_Gain_Exposure.png
+-| sony_IMX678_20240111/
+-│     ├── RAW/
+-│          ├── gt/
+-│          │    └── Scene_Gain_Exposure_Sigma.npy
+-│          ├── noisy/
+-│          │    └── Scene_Gain_Exposure.npy
+-│     ├── RGB/
+-│          ├── gt/
+-│          │    └── Scene_Gain_Exposure_Sigma.png
+-│          ├── noisy/
+-│          │    └── Scene_Gain_Exposure.png
 
 
 ### Description