Bump org.springframework.cloud.fn:spring-functions-catalog-bom from 5.0.2-SNAPSHOT to 5.0.3-SNAPSHOT in /samples/zip-split-rabbit-binder

Bump org.springframework.cloud.fn:spring-functions-catalog-bom from 5.0.2-SNAPSHOT to 5.0.3-SNAPSHOT in /samples/zip-split-rabbit-binder #125