Update README.md

Author: kylebd99

README.md

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+## Note: Galley.jl has been folded into Finch.jl! Future updates are occuring inside of that repository.
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 # Overview
 Galley is a system for declarative sparse tensor algebra. It combines techniques from database query optimization with the flexible formats and execution of sparse tensor compilers, specifically the [Finch compiler](https://github.com/willow-ahrens/Finch.jl). Details about the theory and system design can be found in our paper [here](https://arxiv.org/abs/2408.14706). There are two main ways to interact with Galley:
 * Galley can be used as an optimizer for the array interface of [Finch.jl](https://github.com/finch-tensor/Finch.jl).