Bump flat from 5.0.2 to 6.0.1 #1612

Job	Run time
run (admin-ui, lint)	1m 36s
run (admin-ui, test)	1m 38s
run (admin-ui, build)	2m 4s
run (admin-ui, cy:check-types)	1m 23s
run (admin-ui, cy:run-component)	1m 46s
run (account-ui, lint)	1m 47s
run (account-ui, build)	2m 6s
run (@keycloak/keycloak-admin-client, lint)	1m 56s
run (@keycloak/keycloak-admin-client, build)	1m 17s
run (keycloak-masthead, lint)	1m 8s
run (keycloak-masthead, build)	1m 7s
dependabot	0s
	17m 48s

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