You do not need to inform IRCC at all and are free to leave and come back keeping in mind the 2 out of 5 year residency obligation plus fact you need a valid PR card or PRTD to board a plane back to Canada.
In fact probably the only time IRCC might see a home country address post landing might be if you have spent time outside of Canada and have to fill in a form that asks for addresses from previous 5 years such as a PR card renewal for example. Other than that no need inform anyone.