Fix test command in contributing guide

[mic-sob]

No description provided.

[changeset-bot]

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Latest commit: ea32945

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[remix-cla-bot]

Hi @mic-sob,

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[brophdawg11]

Thanks!

[brophdawg11]

Would you mind signing the CLA so we can get this merged?

[remix-cla-bot]

Thank you for signing the Contributor License Agreement. Let's get this merged! 🥳