update cmo.yml

[tutajm]

The current source for obo and owl files points to files that are very old -- from year 2019.

The new source will point to files that are updated weekly (if needed)

• cmo.owl: https://download.rgd.mcw.edu/ontology/clinical_measurement/clinical_measurement.owl
• cmo.obo: https://download.rgd.mcw.edu/ontology/clinical_measurement/clinical_measurement.obo

[jamesaoverton]

Closed by #931