[#778] PushNotificationTab에서 refreshable이 수행되면 앱이 강제종료되는 현상을 해결한다 (#781)

fix: 푸시 알림 refresh의 MainActor 격리 보장

Author: opficdev

Application/Presentation/NotificationTab/Sources/PushNotification/View+Refreshable.swift

@@ -21,10 +21,10 @@ extension View {
     @ViewBuilder
     func refreshable(
         isEnabled: Bool,
-        action: @escaping @Sendable () async -> Void
+        action: @escaping @MainActor @Sendable () async -> Void
     ) -> some View {
         if isEnabled {
-            refreshable(action: action)
+            refreshable { await action() }
         } else {
             self
         }