fix image url not matching some unicode char
fix image url not matching some unicode char

The current regular expression for image URL matching (`' href="//d.facdn.net/art/.\+">Download'`) will not match URLs that contain certain Unicode characters (e.g., `<a class="button standard mobile-fix" href="//d.facdn.net/art/istani/1560251251/1560251251.istani_카르투하검로드３.png">Download</a>`).

I'm not sure if this is a `grep` issue, but changing the expression to match all non-quote characters (`' href="//d.facdn.net/art/[^"]\+">Download'`) will fix this issue.
Shnatsel/furaffinity-dl