Paywalls: fixed template 2 inconsistent spacing (#3091)

![Screenshot 2023-08-25 at 12 22
57](https://github.com/RevenueCat/purchases-ios/assets/685609/e8a5a662-7374-402f-b6d2-f2a306ea00e0)

![Screenshot 2023-08-25 at 12 18
02](https://github.com/RevenueCat/purchases-ios/assets/685609/1d7fe837-657b-435e-9d66-6baa218677c6)

RevenueCatUI/Templates/Template2View.swift

@@ -51,7 +51,8 @@ struct Template2View: TemplateViewType {
     @ViewBuilder
     var content: some View {
         VStack(spacing: self.defaultVerticalPaddingLength) {
-            Spacer()
+            // Avoid unnecessary spacing, except for iOS 15 because SwiftuI breaks the layout.
+            Spacer(minLength: VersionDetector.iOS15 ? nil : 0)
 
             self.scrollableContent
                 .scrollableIfNecessary(enabled: self.configuration.mode.shouldDisplayPackages)
@@ -122,7 +123,7 @@ struct Template2View: TemplateViewType {
                 .buttonStyle(PackageButtonStyle(isSelected: isSelected))
             }
         }
-        .defaultHorizontalPadding()
+        .padding([.horizontal, .top], self.defaultHorizontalPaddingLength)
 
         Spacer()
     }