Update url anki-editor's repository

The original maintainer, [louietan], has not been responsive for several
years; see for example [l/anki-editor#101]. As such, several people have
now banded together to create anki-editor/anki-editor as a place to
communally continue developing this package; see [anki-editor#31].

[louietan]: https://github.com/louietan
[l/anki-editor#101]: louietan/anki-editor#101
[anki-editor#31]: anki-editor/anki-editor#31

recipes/anki-editor

@@ -1 +1 @@
-(anki-editor :fetcher github :repo "louietan/anki-editor")
+(anki-editor :fetcher github :repo "anki-editor/anki-editor")