[Feature Request]: EmbeddingQAFinetuneDataset save_json add kwargs

[danerlt]

Feature Description

I want to pass the parameters of json.dump when using the save_json method of EmbeddingQAFinetuneDataset object.

Reason

When the text contains Chinese characters, they are saved as Unicode characters in a JSON file and cannot be displayed properly as Chinese characters.

Value of Feature

I can easily view the contents of JSON files.

code:

    def save_json(self, path: str, **kwargs) -> None:
        """Save json."""
        with open(path, "w") as f:
            json.dump(self.dict(), f, indent=4, **kwargs)