[FSSDK-12094] Fix Ruby holdout implementation which related to FSC failures by @esrakartalOpt in 

[FSSDK-12094] chore: preparing for release v5.2.1 by @esrakartalOpt in 

Ruby-SDK - 5.3.0

Ruby-SDK - 5.2.1


Data set that refers to a person or a role and contains at least one address via which the person or role can receive messages.