Why were the ICD10CM in lexmatch not updated?

[matentzn]

https://github.com/monarch-initiative/mondo-ingest/tree/main/src/ontology/lexmatch

@twhetzel I was going to try to push a bit forward on the ICD10 CM front but that is blocking me a little

[matentzn]

(The easiest answer is "because there are no matches for ICD10, but I want to be sure)