[CSSWG][css-cascade-6] Updated WD of Cascading & Inheritance L6

The CSS WG has published an updated Working Draft of the Cascading & Inheritance Module Level 6:

    https://www.w3.org/TR/css-cascade-6/

This CSS module describes how to collate style rules and assign values to all properties on all elements. By way of cascading and inheritance, values are propagated for all properties on all elements. New in this level is the `@scope` rule.

This update doesn't capture all the resolutions since the previous version, but does clarify a few things. The biggest changes included:

• Deferring the scoped descendant combinator
• Settling on 'weak' scope proximity, and removing the 'strong' variant
• Allow shadow hosts to act as implicit scope roots, and be selected with the `:scope` selector


Significant changes are listed at:

https://www.w3.org/TR/2024/WD-css-cascade-6-20240906/#changes-since-2023-03

Please review the draft, and send any comments to this mailing list,
<www-style@w3.org>, prefixed with [css-cascade-6] (as I did on this
message) or (preferably) file them in the GitHub repository at
  https://github.com/w3c/csswg-drafts/issues

For the CSS WG,
-Miriam