docs: Update documentation to reflect changesets publish expected environment variable

[EduardoAC]

Changelog

• Documentation updated to assist with the usage of the action in combination with changesets publish

fixes changesets/changesets#942

Additional context

I wanted to add some background to this PR to provide better context for the reviewers to assist with the approval. The environment variable is defined by how NodeJS is set up within the GitHub Action Setup-node, which will automatically create a .npmrc file using this as an environment variable.

Therefore, the action expects us to use this variable over others, while if you decide to create your own .npmrc, we will be in control. As we can see on here. Hence the documentation updated to align with the previous steps above to align with the setup-node specifications mitigating potential issues when developer use the code given in the Readme

[changeset-bot]

⚠️ No Changeset found

Latest commit: d35d0f9

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[Fart10]

🙏