Update cfsprodacr.azurecr.io/cfs-master/cfs-ruleworker Docker tag to v2023.04.20.8

This MR contains the following updates:

Package	Update	Change
cfsprodacr.azurecr.io/cfs-master/cfs-ruleworker	patch	2023.04.19.12 -> 2023.04.20.8

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