Update bitnami/zookeeper Docker tag to v3.9.0

This MR contains the following updates:

Package	Type	Update	Change
bitnami/zookeeper	ironbank-docker	minor	3.8.2-debian-11-r9 -> 3.9.0-debian-11-r9
bitnami/zookeeper		minor	3.8.2 -> 3.9.0
bitnami/zookeeper	stage	minor	3.8.2-debian-11-r9 -> 3.9.0-debian-11-r9

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