fix: add aync / await in the use ase

Author: maykonmeneghel

Content Generator/Features/CreateContent/Presentation/ContentViewModel.swift

@@ -1,4 +1,4 @@
-struct ContentViewModel {
+import Foundation
 
 @MainActor
 class ContentViewModel: ObservableObject {
@@ -11,7 +11,12 @@ class ContentViewModel: ObservableObject {
         self._fetchContentsUseCase = fetchContentsUseCase
     }
 
-    func fetchContents() -> [ContentEntity] {
-        return _fetchContentsUseCase.call()
+    func fetchContents() async throws {
+        do {
+            let data = try await _fetchContentsUseCase.call()
+            self.contents = data
+        } catch {
+            throw error
+        }
     }
 }