update SmfRegistrations

impl/SMFRegistrationsCollectionApiImpl.cpp

@@ -24,7 +24,8 @@ SMFRegistrationsCollectionApiImpl::SMFRegistrationsCollectionApiImpl(std::shared
     { }
 
 void SMFRegistrationsCollectionApiImpl::query_smf_reg_list(const std::string &ueId, const Pistache::Optional<std::string> &supportedFeatures, Pistache::Http::ResponseWriter &response) {
-    response.send(Pistache::Http::Code::Ok, "Do some magic\n");
+    response.send(Pistache::Http::Code::Ok, "query_smf_reg_list\n");
+	//servingPlmnId  pattern: "^[0-9]{5,6}$"
 }
 
 }