Update README.md

README.md

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 This model is a fine-tuned version of [HuggingFaceTB/SmolLM2-135M](https://huggingface.co/HuggingFaceTB/SmolLM2-135M).
 It has been trained using [TRL](https://github.com/huggingface/trl). 
-It has been trained on the [smoltalk dataset] (https://huggingface.co/datasets/HuggingFaceTB/smoltalk).
+It has been trained on the [smoltalk dataset](https://huggingface.co/datasets/HuggingFaceTB/smoltalk).
 
 ## Quick start