If your site is listed in the Regional branch of the directory, go to the category where it is currently listed and request an update, stating that you have changed localities.
If your site is listed in a Topical branch of the directory and your issue wi that the description mentions the old locality, do an update and request that the description be changed.
If your site is listed in a Topical branch of the directory, and the category path includes locality information, adn you need to have it moved, do an update request asking it to be moved to the correct subcategory. i.e. society/something/something/British Columbia to society/something/something/Ontario.