Merge pull request #68 from rgommers/readme

Update README to link to the html docs for the interchange protocol

Author: kgryte

README.md

@@ -3,4 +3,5 @@
 This repository contains documents, tooling and other content related to the
 API standard for dataframes.
 
-- [Request For Comments (RFC) for the dataframe protocol (blog post)](https://data-apis.org/blog/dataframe_protocol_rfc/)
+- [Request For Comments (RFC) for the dataframe interchange protocol (blog post)](https://data-apis.org/blog/dataframe_protocol_rfc/)
+- [Dataframe interchange protocol documentation](https://data-apis.org/dataframe-protocol/latest/index.html)