gh-actions/release-tests: export QUIETER to docker
gh-actions/release-tests: export QUIETER to docker

RIOT-OS/RIOT,ant9000/RIOT,ant9000/RIOT,miri64/RIOT,OlegHahm/RIOT,miri64/RIOT,authmillenon/RIOT,ant9000/RIOT,OlegHahm/RIOT,kYc0o/RIOT,OlegHahm/RIOT,authmillenon/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,kaspar030/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,kaspar030/RIOT,OTAkeys/RIOT,authmillenon/RIOT,jasonatran/RIOT,kYc0o/RIOT,authmillenon/RIOT,kaspar030/RIOT,miri64/RIOT,RIOT-OS/RIOT,kaspar030/RIOT,miri64/RIOT,authmillenon/RIOT,jasonatran/RIOT,jasonatran/RIOT,kYc0o/RIOT,OTAkeys/RIOT,ant9000/RIOT,RIOT-OS/RIOT,miri64/RIOT,jasonatran/RIOT,kaspar030/RIOT,OTAkeys/RIOT,kYc0o/RIOT,OTAkeys/RIOT,ant9000/RIOT,OlegHahm/RIOT,authmillenon/RIOT,OlegHahm/RIOT,jasonatran/RIOT