docs(cy.stub): Update syntax to use callsFake() instead of deprecated third argument

[sadie100]

While using Cypress, I encountered a deprecated notice when following the official documentation for cy.stub(object, method, replacerFn). Upon investigation, I found that this syntax has been deprecated in Sinon.JS since version 3.0.0. As Cypress is currently using Sinon.JS version 7.3.2(as per package.json), I determined that this was a deprecated specification.

So I made changes in document:

1. Removed the deprecated cy.stub(object, method, replacerFn) syntax from the documentation.
2. Updated related examples to use the new recommended syntax cy.stub(object, method).callsFake(replacerFn).

These changes will help Cypress users write more up-to-date and future-proof test code, avoiding potential deprecation warnings or errors.

Please review and let me know if any further changes or clarifications are needed.

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[cypress-app-bot]

• 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.

[MikeMcC399]

• This PR seems to be an duplicate of PR https://github.com/cypress-io/cypress-documentation/pull/5592 (which apparently was never reviewed).

[sadie100]

I didn't see that! I'll close this.