Update README.md to include ExecuTorch

ExecuTorch is now part of the collection in https://huggingface.co/collections/HuggingFaceTB/smollm3-686d33c1fdffe8e635317e23, specifically this one https://huggingface.co/pytorch/SmolLM3-3B-8da4w

README.md

@@ -198,7 +198,7 @@ text = tokenizer.apply_chat_template(
 )
 ```
 
-For local inference, you can use `llama.cpp`, `ONNX`, `MLX` and `MLC`. You can find quantized checkpoints in this collection (https://huggingface.co/collections/HuggingFaceTB/smollm3-686d33c1fdffe8e635317e23)
+For local inference, you can use `llama.cpp`, `ONNX`, `MLX`, `MLC` and `ExecuTorch`. You can find quantized checkpoints in this collection (https://huggingface.co/collections/HuggingFaceTB/smollm3-686d33c1fdffe8e635317e23)
 
 ### vLLM and SGLang