Missing support of R4b and potential other versions

[jkiddo]

https://github.com/trifork/hapi-fhir/blob/445cb01f59b0e00d155f86da4c9b9b3c5e9d26bf/hapi-fhir-jpaserver-subscription/src/main/java/ca/uhn/fhir/jpa/topic/SubscriptionTriggerMatcher.java#L191 has an unnecessary binding to R5 meaning that support for R4b and potential new versions will fail in using the SubscriptionTriggerMatcher. Fix can be found at #6833