gnu: emacs-org-roam: Update to 1.2.3-0.8ad57b1.

* gnu/packages/emacs-xyz.scm (emacs-org-roam): Update to 1.2.3-0.8ad57b1.
[propagated-inputs]: Replace emacs-org-ref with emacs-org and remove
emacs-company.

Signed-off-by: Christopher Baines <mail@cbaines.net>