docs: Update CONTRIBUTING.md

[janiversen]

Node needs be v14.x not greater. If installing the standard version ‘brew install node’, both ‘yarn’ and ‘code-server’ (release version) complains.

Newest version is v16.x so we are pretty far behind.

Checklist

• updated CHANGELOG.md

[codecov]

Codecov Report

Merging #3630 (ece5de6) into main (bf45e7c) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #3630   +/-   ##
=======================================
  Coverage   60.67%   60.67%           
=======================================
  Files          35       35           
  Lines        1790     1790           
  Branches      404      404           
=======================================
  Hits         1086     1086           
  Misses        562      562           
  Partials      142      142           

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[jsjoeio]

Ah, nice fix!

Yeah I think we're limited by the Node.js version supported for developing VSCode but hoping they catch up soon and then we can catch up.