Update bitnami/redis-sentinel Docker tag to v7.4.0

This MR contains the following updates:

Package	Type	Update	Change
bitnami/redis-sentinel		minor	7.2.5 -> 7.4.0
bitnami/redis-sentinel	ironbank-docker	minor	7.2.5 -> 7.4.0
bitnami/redis-sentinel	stage	minor	7.2.5 -> 7.4.0

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