doc: add section for strategic initiatives

Add reference to strategic initiatives on core README.md
in order to ensure broarder visibility.

Author: mhdawson

README.md

@@ -592,6 +592,7 @@ Previous releases may also have been signed with one of the following GPG keys:
 
 * [Contributing to the project][]
 * [Working Groups][]
+* [Strategic Initiatives][]
 
 [npm]: https://www.npmjs.com
 [Code of Conduct]: https://github.com/nodejs/admin/blob/master/CODE_OF_CONDUCT.md
@@ -600,4 +601,5 @@ Previous releases may also have been signed with one of the following GPG keys:
 [Node.js Website]: https://nodejs.org/en/
 [Questions tagged 'node.js' on StackOverflow]: https://stackoverflow.com/questions/tagged/node.js
 [Working Groups]: https://github.com/nodejs/TSC/blob/master/WORKING_GROUPS.md
+[Strategic Initiatives]: https://github.com/nodejs/TSC/blob/master/Strategic-Initiatives.md
 [#node.js channel on chat.freenode.net]: https://webchat.freenode.net?channels=node.js&uio=d4