fix: SelectBox 컴포넌트 placeHolder 추가 (감리 지적 사항)

packages/common/business_components/src/ui/select/index.tsx

@@ -20,7 +20,7 @@ const SelectBox = React.forwardRef<
     readOnly?: boolean // readOnly 속성 추가
   }
 >(({ label, className, selectClass, selectArray, onSelectValue, value, readOnly = false }, ref)=>{
-  const placeHolder = selectArray?.[0]?.text ?? "";
+  const placeHolder = selectArray?.[0]?.text ?? "선택";
 
   return (
     <div className={className+" flex items-center"} ref={ref}>