Update README.md

Author: lmangani

README.md

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+[![chDB-node](https://github.com/chdb-io/chdb-node/actions/workflows/chdb-node-test.yml/badge.svg)](https://github.com/chdb-io/chdb-node/actions/workflows/chdb-node-test.yml)
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 # chdb-node
 [chDB](https://github.com/auxten/chdb) nodejs bindings for fun and hacking.