v23/model.go: small comment addition to go with v.io/c/16340
v23/model.go: small comment addition to go with v.io/c/16340

MultiPart: 2/2

Change-Id: Iedc67f8b4fcdb4b7544e485c09f3977a8bca37d6

vanadium/go.v23,vanadium/go.v23,vanadium/go.v23