doc: simplify governance info in README intro

Remove unnecessary wordiness in the governance sentence. It appears very
early in the README so it should be short and clear. This also removes
an instance of passive voice.

PR-URL: #23320
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: Trott

README.md

@@ -11,9 +11,8 @@
 Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. For
 more information on using Node.js, see the [Node.js Website][].
 
-Node.js contributions, policies, and releases are managed under an
-[open governance model](./GOVERNANCE.md). The [Node.js Foundation][] provides
-support for the project.
+The Node.js project uses an [open governance model](./GOVERNANCE.md). The
+[Node.js Foundation][] provides support for the project.
 
 **This project is bound by a [Code of Conduct][].**