fix(types): update cy.shadow docs url

[flotwig]

• Closes

User facing changelog

Additional details

How has the user experience changed?

PR Tasks

• Have tests been added/updated?
• Has the original issue or this PR been tagged with a release in ZenHub?
• Has a PR for user-facing changes been opened in cypress-documentation?
• Have API changes been updated in the type definitions?
• Have new configuration options been added to the cypress.schema.json?

[cypress-bot]

Thanks for taking the time to open a PR!

• Create a Draft Pull Request if your PR is not ready for review. Mark the PR as Ready for Review when you're ready for a Cypress team member to review the PR.
• Become familiar with the Code Review Checklist for guidelines on coding standards and what needs to be done before a PR can be merged.

[cypress-bot]

Released in 8.1.0.

This comment thread has been locked. If you are still experiencing this issue after upgrading to
Cypress v8.1.0, please open a new issue.