docs: link to governance docs

Needs vega/.github#2

CONTRIBUTING.md

@@ -2,6 +2,8 @@
 
 Welcome to the Vega community. Everyone is welcome to contribute. We value all forms of contributions including code reviews, patches, examples, community participation, tutorial, and blog posts. In this document, we outline the guidelines for contributing to the various aspects of the project.
 
+All contributions, suggestions, and feedback you submitted are accepted under the [Project's license](./LICENSE). You represent that if you do not own copyright in the code that you have the authority to submit it under the [Project's license](./LICENSE). All feedback, suggestions, or contributions are not confidential. The Project abides by the Vega Organization's [code of conduct](https://github.com/vega/.github/blob/main/CODE_OF_CONDUCT.md) and [governance](https://github.com/vega/.github/blob/main/project-docs/GOVERNANCE.md).
+
 If you send a pull request from a fork, make sure that GitHub actions run successfully. Make sure to add a [`GH_PAT` secret](https://docs.github.com/en/free-pro-team@latest/actions/reference/encrypted-secrets) for a [personal access token](https://docs.github.com/en/free-pro-team@latest/github/authenticating-to-github/creating-a-personal-access-token) with public repository permissions.
 
 If you find a bug in the code or a mistake in the [documentation](https://vega.github.io/vega-lite/docs/) or want a new feature, you can help us by creating an issue to [our repository](https://github.com/vega/vega-lite), or even submit a pull request (PR).