Add missing id: prefix when adding DATE references to checklists

Forgot this, oops.

init.el

@@ -2867,7 +2867,8 @@ eventuelly be set to nil, however)."
   :commands (markdown-mode)
   :init (progn
           (setq markdown-use-pandoc-style-yaml-metadata t
-                markdown-command "pandoc --standalone")
+                markdown-command "pandoc --standalone --toc"
+                markdown-fontify-code-blocks-natively t)
           (fset 'markdown-output-standalone-p #'(lambda () t))
           (add-hook 'markdown-mode-hook #'turn-off-auto-fill)
           (add-hook 'markdown-mode-hook #'turn-on-visual-line-mode)))

site-lisp/db-org.el

@@ -1344,7 +1344,7 @@ inserting the checklist."
                                                                  (ts-active :to ,(ts-now))))))
                (insert "Concurrent DATEs:\n")
                (dolist (date concurrent-dates)
-                 (insert "- " (org-link-make-string (cdr date) (car date)) "\n"))
+                 (insert "- " (org-link-make-string (format "id:%s" (cdr date)) (car date)) "\n"))
                (insert "\n"))
 
              ;; Insert relevant backlinks, when available.