Update README.md

Author: DavidBuchanan314

README.md

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 # atmst
 
-[![Static Badge](https://img.shields.io/badge/license-MIT-blue)](./LICENSE) ![Static Badge](https://img.shields.io/badge/works%20on%20my%20machine-forestgreen) ![Static Badge](https://img.shields.io/badge/test%20coverage-non-zero-red) [![Static Badge](https://img.shields.io/badge/docs-exist!-orange)](https://davidbuchanan314.github.io/atmst/) ![Static Badge](https://img.shields.io/badge/cryptography-certified%20hand--rolled-yellow)
+[![Static Badge](https://img.shields.io/badge/license-MIT-blue)](./LICENSE) ![Static Badge](https://img.shields.io/badge/works%20on%20my%20machine-forestgreen) ![Static Badge](https://img.shields.io/badge/test%20coverage-nonzero-red) [![Static Badge](https://img.shields.io/badge/docs-exist!-orange)](https://davidbuchanan314.github.io/atmst/) ![Static Badge](https://img.shields.io/badge/cryptography-certified%20hand--rolled-yellow)
 
 A Python library for wrangling atproto-flavoured Merkle Search Trees