chore(deps): update quay.io/keycloak/keycloak docker tag to v26 #3070

Job	Run time
build (list, src/list/) / build	6m 29s
build (notify, src/) / build	4m 47s
build (query, src/) / build	5m 36s
build (notify, src/) / sign image	0s
build (notify, src/) / provenance	0s
build (query, src/) / sign image	0s
build (query, src/) / provenance	0s
build (list, src/list/) / provenance	0s
build (list, src/list/) / sign image	0s
test (query, tests/e2e/)	3m 1s
test (notify, tests/e2e/)	1m 33s
k8s-test / test	5m 12s
docker-compose-test / test	9m 8s
release	0s
	35m 46s

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