Update Helm release redis-operator to v0.15.9

This MR contains the following updates:

Package	Update	Change
redis-operator (source)	patch	0.15.7 -> 0.15.9

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Release Notes

OT-CONTAINER-KIT/helm-charts (redis-operator)

v0.15.9

Compare Source

Provides easy redis setup definitions for Kubernetes services, and deployment.

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