how to update my password

Looks like you're trying to change/reset your Apple ID password

You can check this article on how to do that:

Change your Apple ID password - Apple Support

This can work if your Apple ID is signed in on your Apple devices and if you know the current password

If you have forgotten the Apple ID password, you may want to look into this article:

If you forgot your Apple ID password - Apple Support

Depending on how your Apple ID is set up, you may get the options to reset the password by answering security questions or by getting a reset password link sent to your primary or rescue email. If it's asking you to enter the verification codes, you can use the Apple Support app to reset the password

If you are still unable to reset the password, you can try looking into requesting for an account recovery but this option is only available for Apple IDs set up with Two-factor authentication for Apple ID - Apple Support

For account recovery, you can check this article for more info:

How to use account recovery when you can’t reset your Apple ID password - Apple Support

Please Contact - Official Apple Support if you need help with requesting for an account recovery

Hope this helps! Best of luck!