chore(deps): update dependency happy-dom to v7.6.6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
happy-dom	7.6.4 -> 7.6.6

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Release Notes

capricorn86/happy-dom

### [`v7.6.6`](https://togithub.com/capricorn86/happy-dom/releases/tag/v7.6.6) [Compare Source](https://togithub.com/capricorn86/happy-dom/compare/v7.6.5...v7.6.6) ##### :construction_worker_man: Patch fixes - Element.innerHTML should be able to handle other types than string. ([#​639](https://togithub.com/capricorn86/happy-dom/issues/639)) ### [`v7.6.5`](https://togithub.com/capricorn86/happy-dom/releases/tag/v7.6.5) [Compare Source](https://togithub.com/capricorn86/happy-dom/compare/v7.6.4...v7.6.5) ##### :construction_worker_man: Patch fixes - Fixes problem with `HTMLSelectElement.selectedIndex` not reflecting the select attribute set on options. ([#​637](https://togithub.com/capricorn86/happy-dom/issues/637))

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