Okta Authentication - incorrect config example of "scope". It should be "scopes"

### Description

On Okta Authentication page, the code snippet that shows the example how method 'loginByOktaApi' should be configure, have a mistake in "config" object. Instead of "scopes" it has "scope". With current config example, scope object is not passed correctly to OktaAuth() constructor and results in invalid token creation without the scope. Correct spelling should be "scopes"

### URL of Issue(s)

https://docs.cypress.io/guides/end-to-end-testing/okta-authentication#Custom-Command-for-Okta-Authentication