fix(系统设置): 创建系统级别用户组Label有误

--bug=1032890 --user=宋昌昌 [系统设置]github#27552创建用户组页面字段含义和选项值存在差异 https://www.tapd.cn/55049933/s/1437945

system-setting/frontend/src/business/system/group/EditUserGroup.vue

@@ -162,7 +162,7 @@ export default {
         if (data) {
           this.workspaces = data;
           let workspace = this.workspaces.find(item => item.id === scopeId);
-          if (workspace) {
+          if (workspace || !scopeId) {
             // 所属范围为工作空间
             this.showLabel = this.$t('project.owning_workspace');
           } else {