[filter-effects] TYPO

[alemuller]

Typo at Filter Region.

fxtf-drafts/filter-effects/Overview.bs

Line 561 in c0c295c

ng of the element which referenced the filter.

[svgeesus]

Good catch! This is an accidental deletion, not just a typo.

The original text, before this edit by @dirkschulze was:

<p>Negative or zero values for <a element-attr for=filter>width</a> 
or <a element-attr for=filter>height</a> disable rendering 
of the element which referenced the filter.</p>

[svgeesus]

@dirkschulze would you mind fixing this?