update icon: nodejs (original, original-wordmark, plain, plain-wordmark, line, line-wordmark) (#2011)

* Replace plain with alias

* Remove icons style attribute

* Update icons

* Commit suggestions

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Co-authored-by: Josélio Júnior <76992016+lunatic-fox@users.noreply.github.com>
Co-authored-by: Jørgen Kalsnes Hagen <43886029+Snailedlt@users.noreply.github.com>

icons/nodejs/nodejs-plain.svg

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