fix: broken link to contributing document

Author: Gozala

README.md

@@ -186,7 +186,7 @@ otherwise.
 
 Contributions welcome. Please check out [the issues](https://github.com/multiformats/js-cid/issues).
 
-Check out our [contributing document](https://github.com/ipfs/community/blob/master/contributing.md) for more information on how we work, and about contributing in general. Please be aware that all interactions related to multiformats are subject to the IPFS [Code of Conduct](https://github.com/ipfs/community/blob/master/code-of-conduct.md).
+Check out our [contributing document](https://github.com/ipfs/community/blob/master/CONTRIBUTING_JS.md) for more information on how we work, and about contributing in general. Please be aware that all interactions related to multiformats are subject to the IPFS [Code of Conduct](https://github.com/ipfs/community/blob/master/code-of-conduct.md).
 
 Small note: If editing the Readme, please conform to the [standard-readme](https://github.com/RichardLitt/standard-readme) specification.