readme and settings call Anki notes "cards"

[joriki]

README.md and the Anki settings confuse the terms "note" and "card" (see the Anki docs).

For example, here they're used correctly:

https://github.com/FooSoft/yomichan/blob/f2102ade4cfe97be4182bb22d1ae4f609d2364a7/ext/settings.html#L1702-L1703

whereas here notes are referred to as "cards":

https://github.com/FooSoft/yomichan/blob/f2102ade4cfe97be4182bb22d1ae4f609d2364a7/README.md#L153 https://github.com/FooSoft/yomichan/blob/f2102ade4cfe97be4182bb22d1ae4f609d2364a7/ext/settings.html#L1601 https://github.com/FooSoft/yomichan/blob/f2102ade4cfe97be4182bb22d1ae4f609d2364a7/ext/settings.html#L1739

I could imagine that you're aware of this and just didn't bother to be precise, but since these concepts are easy to confuse while you're getting to know Anki, I think it would be worthwhile to be clear about them so as not to add to the confusion.

yomichan version: 21.10.31.1