Pull from bs5-cdn for img assets #724
Description
See:
https://github.com/qld-gov-au/qgds-bootstrap5-cdn/tree/release/v1/v1.1.x-latest/assets/img/
specifically 'coa' crest files
should be in use in this component:
https://github.com/qld-gov-au/qgds-bootstrap5/tree/develop/src/components/bs5/header
may affect theme switching/fills etc.