add: LABEL to pv_formla_options for vskit

Author: Nolan Nichols

linkml_model/model/schema/meta.yaml

@@ -3030,6 +3030,8 @@ enums:
         description: The permissible values are the set of code URIs in the code set
       FHIR_CODING:
         description: The permissible values are the set of FHIR coding elements derived from the code set
+      LABEL:
+        description: The permissible values are the set of human readable labels in the code set
     in_subset:
       - SpecificationSubset
       - BasicSubset