Add Postgres-exporter 0.11.1-debian-11-r23 to image refs (#6290)
Add Postgres-exporter 0.11.1-debian-11-r23 to image refs (#6290)

* Update external-images.yaml

* Update external-images.yaml
kyma-project/test-infra,kyma-project/test-infra,kyma-project/test-infra