docs: Replace Spectrum and Gitter with Discord

[Bertg]

No description provided.

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Name	Status	Preview	Updated
js-lingui	✅ Ready (Inspect)	Visit Preview	May 13, 2022 at 4:46PM (UTC)

[codecov]

Codecov Report

Merging #1243 (26be240) into main (d846e50) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1243   +/-   ##
=======================================
  Coverage   81.69%   81.69%           
=======================================
  Files          56       56           
  Lines        1770     1770           
  Branches      491      491           
=======================================
  Hits         1446     1446           
  Misses        194      194           
  Partials      130      130           

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[Bertg]

For some reason the checks on the commit, and on the PR are not the same.
Not sure what happened there. But everything is green.

[semoal]

Thanks Bert! ❤️

[Bertg]

You are more than welcome @semoal