Attribution Button not respecting 'y' margin

Nobody has claimed this yet.

## Environment

- Xcode version: 26.2
- iOS version: 26.2
- Devices affected: iPhone 17 Pro , iPhone simulators
- Maps SDK Version: 11.18.1

## Observed behavior and steps to reproduce

Given the following code the, 'y' margin of the o.attrributionButton.margins is not working. No matter what number I pul there the attribution button has a static position. The 'x' margin is working as expected. This happens no matter what the 'position' of the attributionButton is (topLeft, topRight, etc)

```
.ornamentOptions({
var o = OrnamentOptions()
let yOffset: CGFloat = !showPOIFilterBar || isShowingNearby || (waypointsCollection.count == 1 && pinnedWaypoint != nil) ? -50 : 0
o.logo.position = .topLeft
o.logo.margins = CGPoint(x: 8, y: 105 + yOffset)
o.attributionButton.position = .topLeft
o.attributionButton.margins = CGPoint(x: 80, y: 105 + yOffset) // <--- issue is here
o.scaleBar.position = .topLeft
o.scaleBar.margins = CGPoint(x: 8, y: 125 + yOffset)
o.compass.position = .topRight
o.compass.margins = CGPoint(x: 5, y: 105 + yOffset)

return o
}())
```

In this image the attribution button should be positioned next to the Mapbox logo. It previously was until after I updated from SDK 11.16 to 11.18

## Expected behavior

I would expect that y margin adjusted based on the value in the ornamentOptions setting

Start by reproducing the sample OrnamentOptions configuration with SDK 11.18.1 and compare its attributionButton behavior with SDK 11.16. Inspect the attributionButton margin handling, focusing on why the x margin changes while the y margin does not; done means the y value positions the button as expected for each supported position.

Written by the indexing model from the issue text.