docs: update desc

docs/index.md

@@ -12,7 +12,7 @@ Efficient detection of planets transiting active stars
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-A python package to search for planetary transits in light curves containing correlated noise (like instrumental systematics or stellar variability). Powered by [JAX](https://github.com/google/jax) and [tinygp](https://github.com/dfm/tinygp).
+*nuance* uses linear models and gaussian processes (using [JAX](https://github.com/google/jax)-based [tinygp](https://github.com/dfm/tinygp)) to simultaneously **search for planetary transits while modeling correlated noises** (e.g. stellar variability) in a tractable way.
 
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