build(deps): bump org.webjars:swagger-ui from 5.18.3 to 5.21.0 in /src #1138

Job	Run time
docker-compose-e2e (17, zulu, false)	2m 0s
mvn-acceptance (17, temurin, false)	2m 2s
mvn-acceptance (23, zulu, true)	2m 0s
mvn-acceptance (21, temurin, false)	1m 58s
docker-compose-e2e-tomcat (17, zulu, false)	2m 2s
	10m 2s

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