feat: upgrade golang-jwt version for apple provider

[burkayanduv]

I was getting token used before issued error with golang-jwt v4, so I've upgraded it to v5. Here is the reference to the issue in the source repository:
Token used before issued #98

This PR updates the Apple provider integration by upgrading the golang-jwt library. Key changes include:

• Upgraded golang-jwt from v4.2.0 to v5.2.1.
• Replaced deprecated methods with the new jwt.NewValidator API for token validation.
• Updated returned error type as jwt.ValidationError was removed in the latest version.

The change in the returned errors will break backwards compatibility if someone has a check on returned error, but that happened in the golang-jwt as well.

[techknowlogick]

Thanks!!