Update Helm release redis to v20

This MR contains the following updates:

Package	Type	Update	Change
redis (source)	HelmChart	major	19.x -> 20.x
redis (source)	HelmChart	major	19.6.1 -> 20.0.3

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Release Notes

bitnami/charts (redis)

v20.0.3

• [bitnami/redis] Release 20.0.3 (#​28941)

v20.0.2

• [bitnami/redis] Release 20.0.2 (#​28881) (582b058), closes #​28881
• [bitnami/redis] Update README after major update (#​28848) (a96205b), closes #​28848

v20.0.1

• [bitnami/redis] fix: Use rollout restart in ginkgo tests (#​28813) (1d8cb54), closes #​28813

v20.0.0

• [bitnami/redis] Release 20.0.0 (#​28810) (9e08d34), closes #​28810

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