refs #21191 [finc] update external link url of de_d117 for ExternalCatalogueLinkTest.php

* docker exec -it [your docker container] sh -c "vendor/bin/phpunit --configuration module/finc/tests/phpunit.xml module/finc/tests/unit-tests/src/fincTest/View/Helper/Root/ExternalCatalogueLinkTest.php"