Update README.md

README.md

@@ -113,7 +113,7 @@ The following datasets were used for continual pre-training.
 - [English Wikipedia](https://dumps.wikimedia.org/other/cirrussearch)
 - [Japanese Wikipedia](https://dumps.wikimedia.org/other/cirrussearch)
 - [Laboro ParaCorpus](https://github.com/laboroai/Laboro-ParaCorpus)
-- [Swallow Corpus Version 2](https://arxiv.org/abs/2404.17733)
+- [Swallow Corpus Version 2](https://arxiv.org/abs/2404.17733) (filtered using [Swallow Education Classifier(Wiki-based)](https://huggingface.co/tokyotech-llm/edu-classifier))
 - [The-stack-v2](https://huggingface.co/datasets/bigcode/the-stack-v2-train-smol-ids)
  
 ## Risks and Limitations