Language selector navigation button missing new `aria-haspopup` attribute

[guywillis]

Subject of the issue

The core has recently been updated to add a aria-haspopup attribute with the value of dialog to the navigational elements that open a drawer overlay.

Please refer to the core issue for the research and discussion.

[github-actions]

🎉 This issue has been resolved in version 5.5.4 🎉

The release is available on GitHub release

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