query default argument does not match the select logic in the file

[romange]

a small UX problem

the default argument is zrangebyscore but the code expects https://github.com/redis-performance/redis-zbench-go/blob/main/redis-zbench-go.go#L137

also, there is no error if the switch misses all the options.

[filipecosta90]

Thank you for noticing this @romange . will address it shortly.