[css-layout-api] "converting" link points to the wrong place

[heycam]

https://drafts.css-houdini.org/css-layout-api/#dom-layoutworkletglobalscope-registerlayout

In step 6, "converting" links to an algorithm to convert a value to a JS String, but this should instead point to the relevant section in Web IDL for converting to a sequence.

[heycam]

Similarly in steps 13 and 17.