Update update-pot to pull from protected live branch of inkscape-web-i18n
Updated as discussed in https://gitlab.com/inkscape/inkscape-web-i18n/merge_requests/2 .
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Updated as discussed in https://gitlab.com/inkscape/inkscape-web-i18n/merge_requests/2 .