Add docs for `HTMLScriptElement.async` and `HTMLScriptElement.defer`

[skyclouds2001]

Description

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Additional details

Related issues and pull requests

part of the https://github.com/mdn/mdn/issues/520

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Preview URLs

• /en-US/docs/Web/API/HTMLScriptElement/async
• /en-US/docs/Web/API/HTMLScriptElement/defer
• /en-US/docs/Web/API/HTMLScriptElement
• /en-US/docs/Web/HTML/Element/script

(comment last updated: 2024-05-07 13:04:13)

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This pull request has merge conflicts that must be resolved before it can be merged.