docs: Update apis to reflect v3 in ios-swift.mdx quickstart

[NandanPrabhu]

Description

PR to update apis in ios-swift.mdx under quickstart to reflect v3 release of auth0.swift SDK

References

https://github.com/auth0/Auth0.swift/blob/master/V3_MIGRATION_GUIDE.md

Testing

Checklist

• I've read and followed CONTRIBUTING.md.
• I've tested the site build for this change locally.
• I've made appropriate docs updates for any code or config changes.
• I've coordinated with the Product Docs and/or Docs Management team about non-trivial changes.

[github-actions]

Summary

Status	Count
🔍 Total	39
✅ Successful	13
⏳ Timeouts	0
🔀 Redirected	5
👻 Excluded	16
❓ Unknown	0
🚫 Errors	5
⛔ Unsupported	0

Errors per input

Errors in main/docs/libraries/auth0-swift.mdx

• [ERROR] https://github.com/auth0/Auth0.swift/blob/master/EXAMPLES.md#check-for-stored-credentials | Cannot find fragment: Fragment not found in document. Check if fragment exists or page structure
• [ERROR] https://github.com/auth0/Auth0.swift/blob/master/EXAMPLES.md#clear-stored-credentials | Cannot find fragment: Fragment not found in document. Check if fragment exists or page structure
• [ERROR] https://github.com/auth0/Auth0.swift/blob/master/EXAMPLES.md#retrieve-stored-credentials | Cannot find fragment: Fragment not found in document. Check if fragment exists or page structure
• [ERROR] https://github.com/auth0/Auth0.swift/blob/master/EXAMPLES.md#retrieve-user-information | Cannot find fragment: Fragment not found in document. Check if fragment exists or page structure
• [ERROR] https://github.com/auth0/Auth0.swift/blob/master/EXAMPLES.md#store-credentials | Cannot find fragment: Fragment not found in document. Check if fragment exists or page structure

Redirects per input

Redirects in main/docs/libraries/auth0-swift.mdx

• [200] https://auth0.github.io/Auth0.swift/documentation/auth0 | Redirect: Followed 1 redirect resolving to the final status of: OK. Redirects: https://auth0.github.io/Auth0.swift/documentation/auth0 --> https://auth0.github.io/Auth0.swift/documentation/auth0/
• [200] https://auth0.github.io/Auth0.swift/documentation/auth0/authentication | Redirect: Followed 1 redirect resolving to the final status of: OK. Redirects: https://auth0.github.io/Auth0.swift/documentation/auth0/authentication --> https://auth0.github.io/Auth0.swift/documentation/auth0/authentication/
• [200] https://auth0.github.io/Auth0.swift/documentation/auth0/credentialsmanager | Redirect: Followed 1 redirect resolving to the final status of: OK. Redirects: https://auth0.github.io/Auth0.swift/documentation/auth0/credentialsmanager --> https://auth0.github.io/Auth0.swift/documentation/auth0/credentialsmanager/
• [200] https://auth0.github.io/Auth0.swift/documentation/auth0/mfaclient | Redirect: Followed 1 redirect resolving to the final status of: OK. Redirects: https://auth0.github.io/Auth0.swift/documentation/auth0/mfaclient --> https://auth0.github.io/Auth0.swift/documentation/auth0/mfaclient/
• [200] https://auth0.github.io/Auth0.swift/documentation/auth0/webauth | Redirect: Followed 1 redirect resolving to the final status of: OK. Redirects: https://auth0.github.io/Auth0.swift/documentation/auth0/webauth --> https://auth0.github.io/Auth0.swift/documentation/auth0/webauth/
  Full Github Actions output

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