[Flutter] How to get rid of "A new flutter project" in link previews?

I've created a flutter web project.

In it, I've updated the description in pubspec.yaml and the title + description in the index.html inside the "web" folder.

However, the preview of the webpage in telegram continues to display the old description: "A new Flutter project." (and the original project's title) not the ones set in the index.html file neither pubspec.yaml:



Where should I update the project's description, so telegram stops displaying the old one?

The description is properly displayed in WhatsApp and Discord... :

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