tree 0f69b11d5b9ab3e0616f004fc3673b24654e3b00
parent 0eddf6c3cdfb60f4690bb7507c75b2d192b98d81
author Yegor <yjbanov@google.com> 1728512511 -0700
committer GitHub <noreply@github.com> 1728512511 +0000
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[web:a11y] make header a proper <header> (#55747)

Now that we have [proper headings](https://github.com/flutter/engine/blob/main/lib/web_ui/lib/src/engine/semantics/heading.dart), headers should become proper headers.

Fixes https://github.com/flutter/flutter/issues/152268