(fix) Update start date field on cohort update

Update start date field on cohort update

Author: icrc-psousa

Diff for: src/add-group-modal/AddGroupModal.tsx

@@ -175,7 +175,7 @@ const AddGroupModal = ({
         uuid: cohortUuid,
         name: name,
         cohortType: config?.groupSessionConcepts?.cohortTypeId,
-        cohortMembers: patientList.map((p) => ({ patient: p.uuid })),
+        cohortMembers: patientList.map((p) => ({ patient: p.uuid, startDate: new Date().toISOString() })),
       });
       if (onPostSubmit) {
         onPostSubmit();