Installing Node.js: update nvm version

[ghost]

Because

This PR updates nvm (Node Version Manager) to version 0.40.1 ensuring users are using the latest stable version.

This PR

• Updates the nvm installation script to version 0.40.1.

Additional Information

https://github.com/nvm-sh/nvm#installation-and-update

Pull Request Requirements

• I have thoroughly read and understand The Odin Project curriculum contributing guide
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[xandora]

Looks good to me.