The contribution guidelines reference a missing ci-check yarn script

[rodet]

yarn ci-check throws an error

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Detailed description

I was about to check a very small pull request and read the instructions from the contributing file.

Step 7 describes running yarn ci-check, but when I ran it I got:

> yarn ci-check
yarn run v1.22.15
error Command "ci-check" not found.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

I couldn't find this script in the package.json either. Has that script been removed or renamed since the contributing.md was written?