[PromoBanner2] - Accessibility issue

[vladko-uxds]

The X button in PromoBannerV2 has no accessible label

Buttons should always have an accessible name. For most buttons, this name will be the same as the text inside the button, between the opening and closing tags. In some cases, for example buttons represented by icons, the accessible name may be provided from the aria-label or aria-labelledby attributes.