시그니처 재생 길이 수정

- 3초에서 7초로 변경

SodaLive/Sources/Live/Room/LiveRoomViewModel.swift

@@ -160,7 +160,7 @@ final class LiveRoomViewModel: NSObject, ObservableObject {
     @Published var signatureImageUrl = "" {
         didSet {
             if signatureImageUrl.trimmingCharacters(in: .whitespacesAndNewlines).count > 0 {
-                DispatchQueue.main.asyncAfter(deadline: .now() + 3.5) {
+                DispatchQueue.main.asyncAfter(deadline: .now() + 7) {
                     if let imageUrl = self.signatureImageUrls.first {
                         self.signatureImageUrl = imageUrl
                         self.signatureImageUrls.removeFirst()