Update README.md

revise dataset description

README.md

@@ -72,7 +72,7 @@ print(decoded)
 
 ## Training Dataset
 
-The model was trained on approximately 100k high-quality Korean instruction examples. The dataset was curated to cover a wide range of Korean language contexts and tasks, with a focus on aligning model outputs with user intent and natural language generation, and is currently undisclosed.
+The model was trained on high-quality Korean instructional data. The dataset was curated to cover a broad range of Korean language contexts and task types, with a focus on aligning model outputs with user intent and natural language generation. It is currently not publicly available.
 
 
 ## Evaluation