doc: simplify support section of README

Make the Support section of the README file easier to read and
understand.

PR-URL: #23170
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

README.md

@@ -49,8 +49,8 @@ When looking for support, please first search for your question in these venues:
 * [Node.js Help][]
 * [Open or closed issues in the Node.js GitHub organization](https://github.com/issues?utf8=%E2%9C%93&q=sort%3Aupdated-desc+org%3Anodejs+is%3Aissue)
 
-If you didn't find an answer in one of the official resources above, you can
-search these unofficial resources:
+If you didn't find an answer in the resources above, try these unofficial
+resources:
 
 * [Questions tagged 'node.js' on StackOverflow][]
 * [#node.js channel on chat.freenode.net][]. See <http://nodeirc.info/> for more
@@ -59,11 +59,11 @@ search these unofficial resources:
 * [Node.js Slack Community](https://node-js.slack.com/): Visit
   [nodeslackers.com](http://www.nodeslackers.com/) to register.
 
-GitHub issues are meant for tracking enhancements and bugs, not general support.
+GitHub issues are for tracking enhancements and bugs, not general support.
 
-Remember, libre != gratis; the open source license grants you the freedom to use
-and modify, but not commitments of other people's time. Please be respectful,
-and set your expectations accordingly.
+The open source license grants you the freedom to use Node.js. It does not
+guarantee commitments of other people's time. Please be respectful and manage
+your expectations.
 
 ## Release Types