message: add cohortDoc -> cohort synonym for demodays collection
diff: @@ -238,6 +238,16 @@ const config = [
  },
  ],
  },
  + {
  + name: "demodays",
  + groups: [
  + {
  + listenerField: "cohortDoc",
  + synonymField: "cohort",
  + transformer: cohortDoc => cohortDoc?.[0]?.snapshot?.cohort,
  + },
  + ],
  + },
  ...cohort2regionCollections([
  "hubResources",
  "sprintSubmissions",
  