Correct the import assertions and attributes compat table

[captainbrosset]

Summary

The compat data for import assertions and attributes is out of date. This PR, hopefully, corrects it.

Some background info:

• import ... from ... assert ... is now deprecated, but still implemented in Chromium (aka import assertions).
• import ... from ... with ... is the new way of doing this (aka import attributes).
• Both syntax can be used with {type: json} or {type: css}. The latter is missing from BCD altogether.
• Safari 17.2 added support for import attributes in 17.2, but only for {type: json}. https://developer.apple.com/documentation/safari-release-notes/safari-17_2-release-notes#JavaScript
• Chromium supports import attributes for both types.

Test results and supporting details

I tested with a local HTML file on Chrome, Edge, Firefox, and Safari. And checked chromestatus.com, and the Safari release notes linked above.

[dandclark]

Thanks for updating this! Just one minor correction.

[Elchi3]

Thank you! 👍