chore(deps): update redis docker tag to v20.6.2

This MR contains the following updates:

Package	Type	Update	Change
redis (source)	HelmChart	patch	20.6.1 -> 20.6.2

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Release Notes

bitnami/charts (redis)

v20.6.2

• [bitnami/redis] Release 20.6.2 (#​31238)

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