macOS: fix swiftlint warnings (#13986)

swiftlint 0.63.3 introduced a new rule called
[`legacy_swiftui_aspect_ratio`](76363aa4d7/CHANGELOG.md (L314))

<img width="509" height="451" alt="image"
src="https://github.com/user-attachments/assets/1ff6f593-ce8a-493e-a241-e9ae418746ee"
/>

macos/Sources/Features/About/CyclingIconView.swift

@@ -39,6 +39,6 @@ struct CyclingIconView: View {
 
         iconImage
             .resizable()
-            .aspectRatio(contentMode: .fit)
+            .scaledToFit()
     }
 }

macos/Sources/Features/Secure Input/SecureInputOverlay.swift

@@ -15,7 +15,7 @@ struct SecureInputOverlay: View {
 
                 Image(systemName: "lock.shield.fill")
                     .resizable()
-                    .aspectRatio(contentMode: .fit)
+                    .scaledToFit()
                     .frame(width: 25, height: 25)
                     .foregroundColor(.primary)
                     .padding(5)