Bug: Embed images are not rendered in PNG export

[X-Raym]

Describe the bug
Hi,

we can embed image using img html code into mermaid graph,
it works in live preview but the export is buggy, as if image were not loaded.

flowchart TD
    aws_db(<div style="width:250px;height:250px"><img src="https://icons.terrastruct.com/azure/Databases%20Service%20Color/Azure%20Database%20for%20PostgreSQL%20servers.svg"/></div>)

Thx!

[github-actions]

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