Update README.md

README.md

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 This `friedrichor/stable-diffusion-2-1-portraiture` model fine-tuned from [stable-diffusion-2-1](https://huggingface.co/stabilityai/stable-diffusion-2-1) with [friedrichor/PhotoChat_120_square_HQ](https://huggingface.co/datasets/friedrichor/PhotoChat_120_square_HQ)  
 
-This model is not trained solely for Text-to-Image tasks, but as a part of the `Tiger`(currently not open-source and submission) model for Multimodal Dialogue Response Generation.
+This model is not trained solely for Text-to-Image tasks, but as a part of the *Tiger*(currently not open-source and submission) model for Multimodal Dialogue Response Generation.
 
 # Model Details