[CSSWG][css-cascade-6] Updated WD of CSS Cascade and Inheritance Level 6

The CSS WG has published an updated Working Draft of CSS Cascade and Inheritance 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.

This update represents over a year of updating and refining the specification based on author and implementor feedback. For example:

* Clarified the interactions between nesting and scope
* Allowed styles nested in the DOM to create scopes based on their location
* Excluded the scope limits from scope, and only matching scope roots when explicitly requested
* Removed the scoping selector specificity from scoped selectors

Significant changes are listed at:

https://www.w3.org/TR/2023/WD-css-cascade-6-20230321/#changes-2022-08

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

Cheers,
-Miriam