[go_router_builder]: Fix Parameter generates a warning

[CaoGiaHieu-dev]

Fix: flutter/flutter#164621

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[chunhtai]

LGTM

[chunhtai]

LGTM

[hannah-hyj]

LGTM, thanks!

[chunhtai]

Hi @CaoGiaHieu-dev you will also need to bump the version in package.yaml

[vware]

works well, thanks @CaoGiaHieu-dev

[vware]

@chunhtai is there anything else needed?