Update README.md

[therovermind]

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

Affected core subsystem(s)

[cjihrig]

We just removed the Gitter badge in #13231.

[therovermind]

okay..but its a great community...anyway thanks! @cjihrig

[Trott]

Yes, thanks for the contribution. There are lots of great Node.js communities we don't list. (I'll throw in a shout-out to node-js.slack.com.) For the most part, we only list resources that we directly support. I'd actually probably prefer that we remove the remaining "Unofficial" resource than expand the list. The (IMO only) reason for keeping that one unofficial IRC resource is so that people don't use our core dev IRC channel for support questions.

[therovermind]

ohh great! ;)..thanks @Trott