docs: link to Vega project about page

site/index.md

@@ -81,6 +81,7 @@ For more information, read our [introduction article to Vega-Lite v2 on Medium](
 ## Additional Links
 
 - Award winning [research paper](https://idl.cs.washington.edu/papers/vega-lite) and [video of our OpenVis Conf talk](https://www.youtube.com/watch?v=9uaHRWj04D4) on the design of Vega-Lite
+- [The about page for the Vega project](https://vega.github.io/vega/about/)
 - Listen to a Data Stories episode about [Declarative Visualization with Vega-Lite and Altair](http://datastori.es/121-declarative-visualization-with-vega-lite-and-altair-with-dominik-moritz-jacob-vanderplas-kanit-ham-wongsuphasawat/)
 - [JSON schema](http://json-schema.org/) specification for [Vega-Lite](https://github.com/vega/schema) ([latest](https://vega.github.io/schema/vega-lite/v5.json))
 - Ask questions about Vega-Lite on [Stack Overflow](https://stackoverflow.com/tags/vega-lite) or [Slack](https://bit.ly/join-vega-slack-2022)