시그니처 캔 수정

- 이미지, 활성화 데이터 필수에서 제외

src/main/kotlin/kr/co/vividnext/sodalive/admin/live/signature/AdminSignatureCanController.kt

@@ -32,8 +32,8 @@ class AdminSignatureCanController(private val service: AdminSignatureCanService)
     @PutMapping
     fun modifySignatureCan(
         @RequestParam("id") id: Long,
-        @RequestParam("image") image: MultipartFile?,
-        @RequestParam("isActive") isActive: Boolean?
+        @RequestParam("image", required = false) image: MultipartFile?,
+        @RequestParam("isActive", required = false) isActive: Boolean?
     ) = run {
         if (image == null && isActive == null) {
             throw SodaException("변경사항이 없습니다.")