LibWeb: Wait for the iframe load before completing the beforeunload test

Commit be9071834e pushed by 0ct0pu5master

Workflow ladybird-js-artifacts.yml

build-and-package (macos-14, macOS, macOS-universal2)

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build-and-package (ubuntu-24.04, Linux, Linux-x86_64)

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build-and-package (macos-14, macOS, macOS-universal2)

Canceled