fix(docs): remove Couchbase references #8734

Job	Run time
sonar scan (jans-keycloak-link)	6m 58s
sonar scan (jans-keycloak-integration)	6m 50s
sonar scan (jans-auth-server)	6m 58s
sonar scan (agama)	6m 54s
sonar scan (jans-config-api)	6m 59s
sonar scan (jans-core)	6m 50s
sonar scan (jans-linux-setup)	6m 49s
sonar scan (jans-cli-tui)	6m 48s
sonar scan (jans-fido2)	6m 49s
sonar scan (jans-orm)	7m 10s
sonar scan (jans-scim)	6m 55s
sonar scan (jans-pycloudlib)	6m 51s
sonar scan (jans-link)	6m 54s
sonar scan (jans-casa)	6m 51s
sonar scan (jans-lock)	6m 49s
	1h 43m 25s

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