Hello, pablito48. Welcome to the Apple Support Communities. We understand that you recently noticed a prompt to update your Apple ID information. We know that you must be concerned about sharing your information and we’d be happy to help you find the best solution here.
As it turns out, you may notice a prompt like this from time to time when using your Apple devices. Since the prompt is being sent from the internal Settings app on your device, you should be safe to action the prompt and update your Apple ID information.
If this were a pop up message from a web browser or other app, we would not suggest entering your information unless you are sure the request is secure. You can find more helpful information in the following Apple Support articles as well:
Manage Apple ID settings on iPhone - Apple Support
Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support
We hope that this answer helps you. Please reply back if you have any additional questions.
Cheers!