docs: mention where it is used

Author: sqs

README.md

@@ -6,7 +6,7 @@
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 [![sourcegraph: search](https://img.shields.io/badge/sourcegraph-search-brightgreen.svg)](https://sourcegraph.com/github.com/sourcegraph/codeintellify)
 
-> Adds code intelligence to code views on the web
+Adds code intelligence to code views on the web. Used in [Sourcegraph](https://sourcegraph.com).
 
 ## What it does