citar--format-candidates docstring confusion

[hermanhel]

In the docstring of citar--format-candidates, citar-bibliographies is used rather than citar-bibliography or citar--bibliographies, whichever make more sense.

https://github.com/emacs-citar/citar/blob/ac91ec3a29c6e7bb61008ce42deef4ecb377e648/citar.el#L965C16-L965C21