Added link in readme file for error handling

[camilovtex]

What is the purpose of this pull request?

What problem is this solving?

How to test it?

Screenshots or example usage

How does this PR make you feel? 🔗

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Types of changes

• Chore (non-breaking change which doesn't change any functionalities)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Requires change to documentation, which has been updated accordingly.

[vtex-io-ci-cd]

Hi! I'm VTEX IO CI/CD Bot and I'll be helping you to publish your app! 🤖

Please select which version do you want to release:

• Patch (backwards-compatible bug fixes)

• Minor (backwards-compatible functionality)

• Major (incompatible API changes)

And then you just need to merge your PR when you are ready! There is no need to create a release commit/tag.

• No thanks, I would rather do it manually 😞

[iaurg]

@choque9 @camilovtex The link https://www.notion.so/vtexhandbook/Errors-that-the-affiliate-app-may-present-128f8223cee9800a93e7f9a32ea99fba?pvs=4 is not available for the public.