[filter-effects-1] Animation type, CORS fetch links broken

[svgeesus]

As I mentioned in the transition request there were some broken links, which held up manual republication.

These fell into two groups:

1. Animation changes
2. CORS link

Animation types were linking to css transitions, which used to define them:

error Lines: 793, 802, 805, 808, 5571, 5607, 6660 https://www.w3.org/TR/css-transitions-1/
    Status: 200 OK

    Some of the links to this resource point to broken URI fragments (such as index.html#fragment). 
    Broken fragments:

        https://www.w3.org/TR/css-transitions-1/#animtype-shadow-list (line 808)
        https://www.w3.org/TR/css-transitions-1/#animtype-precentage (line 5607)
        https://www.w3.org/TR/css-transitions-1/#animtype-number (lines 802, 805, 5607)
        https://www.w3.org/TR/css-transitions-1/#animtype-color (lines 5571, 6660)
        https://www.w3.org/TR/css-transitions-1/#animtype-length (line 793)

These have moved to Web Animations, which defines classes of animation types. It seems that these are simplified; instead of 'animates as a color' we just say the computed value is animated. I think.

The CORS-enabled fetch has moved from the HTML5 spec to Fetch. I think this is the correct link

CORS request

Raising as an issue for discussion, because the link changes I put in to satisfy the pubrules link checker might not be the optimal ones (and the source .bs needs to be corrected so these broken links don't keep recurring).