fix: add updatedAt variable to the article template to get the last updated timestamp of the library item

src/settings/template.ts

@@ -77,6 +77,7 @@
       state: string
       dateArchived?: string
       image?: string
+      updatedAt: string
     }
   | FunctionMap
 
@@ -252,6 +253,7 @@
     state: getArticleState(article),
     dateArchived: article.archivedAt,
     image: article.image,
+    updatedAt: article.updatedAt,
     ...functionMap,
   }
 
@@ -304,7 +306,7 @@
         continue
       }
 
       const value = (articleView as any)[articleVariable]
       if (value) {
         // if variable is in article, use it
         frontMatter[key] = value