correct schema

Author: dragonstyle

src/resources/schema/document-links.yml

@@ -142,7 +142,7 @@
             description: "Whether to show a back button in the notebook preview."
   description: "Options for controlling the display and behavior of Notebook previews."
 
-- canonical-url:
+- name: canonical-url
   tags:
     formats: [$html-doc]
   schema: