Update README.md

Author: bidoubiwa

README.md

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 **Meilisearch** is an open-source search engine. [Discover what Meilisearch is!](https://github.com/meilisearch/meilisearch)
 
-This library is a plugin that establishes communication between your [Meilisearch](https://github.com/meilisearch/meilisearch) instance and [InstantSearch](https://github.com/algolia/instantsearch.js). InstantSearch, an open-source project developed by Algolia, is the tool that renders all the components needed to start searching in your front-end application.
+This library is a client that establishes communication between your [Meilisearch](https://github.com/meilisearch/meilisearch) instance and [InstantSearch](https://github.com/algolia/instantsearch.js). InstantSearch, an open-source project developed by Algolia, is the tool that renders all the components needed to start searching in your front-end application.
 
 Instead of reinventing the wheel, we have opted to reuse the InstantSearch library for our own front-end tooling. We will contribute upstream any improvements that may result from our adoption of InstantSearch.