fix(character-gallery): 이미지 비율을 4:5 -> 2:3으로 수정

SodaLive/Sources/Chat/Character/Detail/Gallery/CharacterDetailGalleryView.swift

@@ -142,7 +142,7 @@ struct CharacterDetailGalleryView: View {
     private func galleryImageView(item: CharacterImageListItemResponse, index: Int) -> some View {
         GeometryReader { geo in
             let width = geo.size.width
-            let height = width * 5 / 4
+            let height = width * 3 / 2
             
             ZStack {
                 // 이미지
@@ -201,7 +201,7 @@ struct CharacterDetailGalleryView: View {
                 viewModel.onImageTapped(item, index: index)
             }
         }
-        .aspectRatio(4/5, contentMode: .fit)
+        .aspectRatio(2/3, contentMode: .fit)
     }
 }