To travel outside the US while your I-485 is pending, you'll need to apply for Advance Parole by filing Form I-131, which allows you to re-enter the country without abandoning your green card application.

To update your address, submit Form AR-11 electronically through the USCIS website or mail it to the address listed on the form

If you have a valid, unexpired visa in your passport, you might be able to travel, but it's highly recommended to obtain Advance Parole to avoid any issues upon re-entry