Suggested readme update

[allenschmaltz]

I believe these 2 papers and 2 blog posts will be of interest to LLM interpretability researchers, as they cover a rather different set of approaches for interpretability over the models with non-identifiable parameters (e.g., LLMs), and work well in practice. These can be characterized at a high-level as "uncertainty-aware interpretability-by-exemplar" methods.

Feel free to include or not include at your discretion. (I also fixed a minor typo.)